332354 + Interview Questions in Secondary School in Math

1.	The ratio of the no.of boys and girls in a class is 9:5.Find the number of boys if the total no.of students in the class is 42.Guys plz help me quick its very important..And don't unwanted answers plz its very important.
Answer» Step-by-step explanation: 27 is the ANSWER for above question boys = 9/14 ×42 = 27

1.

The ratio of the no.of boys and girls in a class is 9:5.Find the number of boys if the total no.of students in the class is 42.Guys plz help me quick its very important..And don't unwanted answers plz its very important.

Answer»

Step-by-step explanation:

27 is the ANSWER for above question

boys = 9/14 ×42

= 27

Discussion

2.	Cot‐¹(1-x/1+x)‐1⁄2 expansion by maclaurin series?
Answer» ANSWER: SORRY BRUH IDK this ANS ☹️☹️☹️☹️☹️☹️✌✌✌✌✌✌

2.

Cot‐¹(1-x/1+x)‐1⁄2 expansion by maclaurin series?

Answer»

ANSWER:

SORRY BRUH IDK this ANS ☹️☹️☹️☹️☹️☹️✌✌✌✌✌✌

Discussion

3.	Translate each of the following statements into an equation, using x as the variable.(a) 13 subtracted from twice a number gives 3.(b) Two-third of a number is 12.(c) 9 added to twice a number gives 13.(d) 1 subtracted from one-third of a number gives 1.
Answer» ANSWER: a. 2x-13=3 b. 2/3x=12 c. 9+2x=13 d. 1/3x-1=1

3.

Translate each of the following statements into an equation, using x as the variable.(a) 13 subtracted from twice a number gives 3.(b) Two-third of a number is 12.(c) 9 added to twice a number gives 13.(d) 1 subtracted from one-third of a number gives 1.

Answer»

ANSWER:

a. 2x-13=3

b. 2/3*x=12

c. 9+2x=13

d. 1/3*x-1=1

Discussion

4.	Which shows a rational number plotted correctly on a number line? Picture given below. Will mark brainliest if correct.
Answer» ANSWER: -6.5 is the answer Step-by-step EXPLANATION: HOPE Its CORRECT

4.

Which shows a rational number plotted correctly on a number line? Picture given below. Will mark brainliest if correct.

Answer»

ANSWER:

-6.5 is the answer

Step-by-step EXPLANATION:

HOPE Its CORRECT

Discussion

5.	Pls ans the question plssssss correct answer will be marked as brainliest
Answer» ANSWER: this is the answer please MAKE me BRAINLIEST answer

5.

Pls ans the question plssssss correct answer will be marked as brainliest

Answer»

ANSWER:

this is the answer

please MAKE me BRAINLIEST answer

Discussion

6.	How to tell if the temperature is hot or cold?
Answer» ANSWER: If you feel hot or chilled, there's a pretty good CHANCE you have a fever." FEVERS can MAKE people feel hot or cold, Cutler says. You might feel and look flushed (with rosy skin) or shiver, both of which indicate that your BODY is trying to lower your temperature Step-by-step explanation: *hope you like this*

6.

How to tell if the temperature is hot or cold?

Answer»

ANSWER:

If you feel hot or chilled, there's a pretty good CHANCE you have a fever." FEVERS can MAKE people feel hot or cold, Cutler says. You might feel and look flushed (with rosy skin) or shiver, both of which indicate that your BODY is trying to lower your temperature

Step-by-step explanation:

hope you like this

Discussion

7.	( 15+4)____(3×9) , are the two given equation with a blank in between them . Which sign will you use to fill in the blank in order to compar them
Answer» ANSWER: 19< 27 will be the answer

7.

( 15+4)____(3×9) , are the two given equation with a blank in between them . Which sign will you use to fill in the blank in order to compar them

Answer»

ANSWER:

19< 27

will be the answer

Discussion

8.	+Solve thetemmethodx + y + z = 3& thy + 32 - 4 4x +44 +92 - 6
Answer» ANSWER: x=1 FINALLY. .. x+44+92-6 1+44+92-6=131

8.

+Solve thetemmethodx + y + z = 3& thy + 32 - 4 4x +44 +92 - 6

Answer»

ANSWER:

x=1

FINALLY. ..

x+44+92-6

1+44+92-6=131

Discussion

9.	Increase of 220kg by 25%
Answer» Answer: 275 Step-by-step EXPLANATION: =220%25 =275 ok PLZ CLICK on THANKS

9.

Increase of 220kg by 25%

Answer»

Answer:

275

Step-by-step EXPLANATION:

=220%25

=275

ok PLZ CLICK on THANKS

Discussion

10.	If 1000000 = 85000 then 1000 = ?
Answer» ANSWER: 85 will be the answer to the QUESTION

10.

If 1000000 = 85000 then 1000 = ?

Answer»

ANSWER:

85 will be the answer to the QUESTION

Discussion

11.	Express 2+1/(1+i)(1-2i) in the polar form
Answer» Answer: Question is, \BEGIN{gathered}z = \frac{1 - 2i}{1 - {(1 - i)}^{2} } \\ to \: find \: the \: polar \: form \: it \: is \: necessary \: to \: convert \: it \: into \: standerd \: form \\ z = \frac{1 - 2i}{1 - (1 + {i}^{2} - 2i)} \\ z = \frac{1 - 2i}{1 + 2i} \\ on \: rationalising \\ z = \frac{1 - 2i}{1 + 2i} \times \frac{1 - 2i}{1 - 2i} \\and \: on \: solving \\ z = \frac{ - 3}{5} - \frac{4i}{5} \\ \end{gathered} z= 1−(1−i) 2 1−2i tofindthepolarformitisnecessarytoconvertitintostanderdform z= 1−(1+i 2 −2i) 1−2i z= 1+2i 1−2i onrationalising z= 1+2i 1−2i × 1−2i 1−2i andonsolving z= 5 −3 − 5 4i from here we can note that, x = \frac{ - 3}{5} \: and \: y = \frac{ - 4}{5}x= 5 −3 andy= 5 −4 then, \begin{gathered} { \|z\| }^{2} = {r}^{2} = {( \frac{ - 3}{5} )}^{2} + {( \frac{ - 4}{5} )}^{2} \\ so \: \|z\| = r = 1\end{gathered} ∣z∣ 2 =r 2 =( 5 −3 ) 2 +( 5 −4 ) 2 so∣z∣=r=1 we know that, \begin{gathered} \tan( \alpha ) = \| \frac{imaginary}{real} \| \\ on \: putting \: value \\ \tan( \alpha ) = \| \frac{ \frac{ - 4}{5} }{ \frac{ - 3}{5} } \| \\ \tan( \alpha ) = \frac{4}{3} \\ also \: \sin( \alpha ) = \frac{4}{5} \\ \: \: \: \ \: \: \: \: \: cos( \alpha ) = \frac{3}{5} \end{gathered} tan(α)=∣ real imaginary ∣ onputtingvalue tan(α)=∣ 5 −3 5 −4 ∣ tan(α)= 3 4 alsosin(α)= 5 4 cos(α)= 5 3 on putting these value in the form, \begin{gathered}z = r(\cos( \alpha ) + i \sin( \alpha ) ) \\ \: z = 1( \ \ - cos( { \tan }^{ - 1} \frac{4}{3} ) + ( - i \sin( { \tan }^{ - 1} \frac{4}{3} )) \\ finally \\ z = ( - \cos( { \tan }^{ - 1} \frac{4}{3} ) - i \sin( { \tan }^{ - 1} \frac{4}{3} )\end{gathered} z=r(cos(α)+isin(α)) z=1( −cos(tan −1 3 4 )+(−isin(tan −1 3 4 )) finally z=(−cos(tan −1 3 4 )−isin(tan −1 3 4 ) thank you

11.

Express 2+1/(1+i)(1-2i) in the polar form

Answer»

Answer:

Question is,

\BEGIN{gathered}z = \frac{1 - 2i}{1 - {(1 - i)}^{2} } \\ to \: find \: the \: polar \: form \: it \: is \: necessary \: to \: convert \: it \: into \: standerd \: form \\ z = \frac{1 - 2i}{1 - (1 + {i}^{2} - 2i)} \\ z = \frac{1 - 2i}{1 + 2i} \\ on \: rationalising \\ z = \frac{1 - 2i}{1 + 2i} \times \frac{1 - 2i}{1 - 2i} \\and \: on \: solving \\ z = \frac{ - 3}{5} - \frac{4i}{5} \\ \end{gathered}

z=

1−(1−i)

2

1−2i

tofindthepolarformitisnecessarytoconvertitintostanderdform

z=

1−(1+i

2

−2i)

1−2i

z=

1+2i

1−2i

onrationalising

z=

1+2i

1−2i

×

1−2i

andonsolving

z=

5

−3

−

5

4i

from here we can note that,

x = \frac{ - 3}{5} \: and \: y = \frac{ - 4}{5}x=

5

−3

andy=

5

−4

then,

\begin{gathered} { |z| }^{2} = {r}^{2} = {( \frac{ - 3}{5} )}^{2} + {( \frac{ - 4}{5} )}^{2} \\ so \: |z| = r = 1\end{gathered}

∣z∣

2

=r

2

=(

5

−3

)

2

+(

5

−4

)

2

so∣z∣=r=1

we know that,

\begin{gathered} \tan( \alpha ) = | \frac{imaginary}{real} | \\ on \: putting \: value \\ \tan( \alpha ) = | \frac{ \frac{ - 4}{5} }{ \frac{ - 3}{5} } | \\ \tan( \alpha ) = \frac{4}{3} \\ also \: \sin( \alpha ) = \frac{4}{5} \\ \: \: \: \ \: \: \: \: \: cos( \alpha ) = \frac{3}{5} \end{gathered}

tan(α)=∣

real

imaginary

∣

onputtingvalue

tan(α)=∣

5

−3

5

−4

∣

tan(α)=

3

4

alsosin(α)=

5

4

cos(α)=

5

3

on putting these value in the form,

\begin{gathered}z = r(\cos( \alpha ) + i \sin( \alpha ) ) \\ \: z = 1( \ \ - cos( { \tan }^{ - 1} \frac{4}{3} ) + ( - i \sin( { \tan }^{ - 1} \frac{4}{3} )) \\ finally \\ z = ( - \cos( { \tan }^{ - 1} \frac{4}{3} ) - i \sin( { \tan }^{ - 1} \frac{4}{3} )\end{gathered}

z=r(cos(α)+isin(α))

z=1( −cos(tan

−1

3

4

)+(−isin(tan

−1

3

4

))

finally

z=(−cos(tan

−1

3

4

)−isin(tan

−1

3

4

)

thank you

Discussion

12.	In a fruit punch drink, the 3 ingredients are apple juice, orange juice and cranberry juice. If 2/7 of the drink is apple juice and 1/2 is orange juice then write the ratio of cranberry juice to apple juice to orange juice in its simplest form.
Answer» ANSWER: here is your answer PLEASE MARK me BRILLIANT STUDENT

12.

In a fruit punch drink, the 3 ingredients are apple juice, orange juice and cranberry juice. If 2/7 of the drink is apple juice and 1/2 is orange juice then write the ratio of cranberry juice to apple juice to orange juice in its simplest form.

Answer»

ANSWER:

here is your answer PLEASE MARK me BRILLIANT STUDENT

Discussion

13.	If xsin3A+ycos3A = sinAcosA and xsinA=ycosA then prove that x2+y2=1
Answer» ANSWER: HOPE it helps. Step-by-step EXPLANATION: THANK you

13.

If xsin3A+ycos3A = sinAcosA and xsinA=ycosA then prove that x2+y2=1

Answer»

ANSWER:

HOPE it helps.

Step-by-step EXPLANATION:

THANK you

Discussion

14.	An amount doubles in 5 years by the simple interest. How many years arerequired for the same amount with same rate of interest to get converted to fivetimes the original amount?
Answer» Step-by-step EXPLANATION: HOPE it MAY HELP you #666

14.

An amount doubles in 5 years by the simple interest. How many years arerequired for the same amount with same rate of interest to get converted to fivetimes the original amount?

Answer»

Step-by-step EXPLANATION:

HOPE it MAY HELP you #666

Discussion

15.	7. Simplify: 1 + 10 + 100 x 1000 - 1111
Answer» Answer: 98900 Step-by-step explanation: 1+10+100x1000-1111 = 1+10+100000-1111= 11+100000-1111= 100011-1111= 98900

15.

7. Simplify: 1 + 10 + 100 x 1000 - 1111

Answer»

Answer:

98900

Step-by-step explanation:

1+10+100x1000-1111 =

1+10+100000-1111=

11+100000-1111=

100011-1111=

98900

Discussion

16.	Explain what the inequality means in relation to the positions of these numbers on the number line Number line from negative 8 to positive 8 in increments of 1 is shown.please answer fast i have been taking to long on this test (20 points)
Answer» $\huge\tt{\bold{\pink{\underline{\underline{Question᎓}}}}}$ EXPLAIN what the inequality means in relation to the POSITIONS of these numbers on the number line Number line from negative 8 to positive 8 in increments of 1 is shown.PLEASE answer fast i have been taking to long on this TEST (20 points) $\huge\tt{\bold{\purple{\underline{\underline{Answer᎓}}}}}$ Check out the attachment please.

16.

Explain what the inequality means in relation to the positions of these numbers on the number line Number line from negative 8 to positive 8 in increments of 1 is shown.please answer fast i have been taking to long on this test (20 points)

Answer»

$\huge\tt{\bold{\pink{\underline{\underline{Question᎓}}}}}$

EXPLAIN what the inequality means in relation to the POSITIONS of these numbers on the number line Number line from negative 8 to positive 8 in increments of 1 is shown.PLEASE answer fast i have been taking to long on this TEST (20 points)

$\huge\tt{\bold{\purple{\underline{\underline{Answer᎓}}}}}$

Check out the attachment please.

Discussion

17.	Linear equations in one variable chapter 5x+9=5+3xsolve these problems
Answer» Answer: *the* *answer* is x=-2 . *HOPE* it *help* *you. GOOD* *NIGHT* *DEAR*.

17.

Linear equations in one variable chapter 5x+9=5+3xsolve these problems

Answer»

Answer:

the answer is x=-2 .

HOPE it help you. GOOD NIGHT DEAR.

Discussion

18.	Basis of price question and answer for school project
Answer» ANSWER: vbbrhrhehyhejyuietjjejtheurjj

18.

Basis of price question and answer for school project

Answer»

ANSWER:

vbbrhrhehyhejyuietjjejtheurjj

Discussion

19.	इंडियन गर्ल एबीसी एंगल बी इक्वल टू 5 डिग्री एंड एंगल सी इक्वल 55 डिग्री राइट व्हिच ऑफ द फॉलोइंग इज ट्रू
Answer» ANSWER: sorry I don't know hindi can you ask in english Step-by-step EXPLANATION:

19.

इंडियन गर्ल एबीसी एंगल बी इक्वल टू 5 डिग्री एंड एंगल सी इक्वल 55 डिग्री राइट व्हिच ऑफ द फॉलोइंग इज ट्रू

Answer»

ANSWER:

sorry I don't know hindi can you ask in english

Step-by-step EXPLANATION:

Discussion

20.	What is apple???follow karte jao 5000 ruppee dunga ..xD
Answer» ANSWER: into chemical energy. During PHOTOSYNTHESIS in green plants, light energy is captured and used to convert WATER, carbon dioxide, and minerals into oxygen and energy-rich org xd oh REALLY 5000

20.

What is apple???follow karte jao 5000 ruppee dunga ..xD

Answer»

ANSWER:

into chemical energy. During PHOTOSYNTHESIS in green plants, light energy is captured and used to convert WATER, carbon dioxide, and minerals into oxygen and energy-rich org

xd

oh REALLY

5000

Discussion

21.	Perimeter of equilateral triangle is 180 cm . find the area
Answer» Answer: 1558.84 cm² is the area Step-by-step EXPLANATION: PERIMETER of △ABC= 180CM. So the side of an equilateral TRIANGLE is 60cm. Area of the equilateral triangle is given as Area = √34x2 where X is the side of the equilateral triangle. Hence the area of the triangle is 1558.84cm2. *mark* *this* as *brainlist* *answer*

21.

Perimeter of equilateral triangle is 180 cm . find the area

Answer»

Answer:

1558.84 cm² is the area

Step-by-step EXPLANATION:

PERIMETER of △ABC= 180CM. So the side of an equilateral TRIANGLE is 60cm. Area of the equilateral triangle is given as Area = √34x2 where X is the side of the equilateral triangle. Hence the area of the triangle is 1558.84cm2.

mark this as brainlist answer

Discussion

22.	(d) / 3e-(2x+7) dxfind
Answer» ANSWER: Step-by-step EXPLANATION:

22.

(d) / 3e-(2x+7) dxfind

Answer»

ANSWER:

Step-by-step EXPLANATION:

Discussion

23.	(ii) anode(e) The electrode connected to the negative terminal of a battery is called(i) cathode(iv) none of these(iii) ion
Answer» ANSWER: Bhai question SAHI se BHEJO PLEASE

23.

(ii) anode(e) The electrode connected to the negative terminal of a battery is called(i) cathode(iv) none of these(iii) ion

Answer»

ANSWER:

Bhai question SAHI se BHEJO PLEASE

Discussion

24.	Q.7 Solve the following questo(i) Find the value of a & b that would make the Quadrilateral, a parallelogram 5a-13,8b,10b-3,3a-5
Answer» Answer: A man is 37 years old and his two sons are 8 years and 3 years old. After how many years will he be twice as old as the sum of the ages of his sons? Cheaters are stay away!! Don't spam Moderators and brainly stars are GIVE answers.. (In Explanation) Step-by-step explanation: ❍ Let the number of years in which his age will be twice as old as the sum of his sons be x years respectively. Present age of Man is 37 years old and Present age of his first son is 8 years old and second one is 3 years old. Therefore, — In x years their ages; Age of Man = (37 + x) Age of First son = (8 + x) Age of YOUNGER son = (3 + x) \rule{250px}{.3ex} ⠀⠀\qquad\quad{\underline{ \underline{ \pink{\bigstar\:\frak{ACCORDING \: to \: the \: Given \: Question :}}}}} ★AccordingtotheGivenQuestion: ⠀⠀ The age of FATHER will be twice as old as the sum of ages of his sons. ⠀⠀ Therefore, ⠀ ★ Father's age = 2(Sum of ages of son) ★ ⠀⠀ \begin{gathered}:\implies\sf (37 + x) = 2\Big[(8 + x) + (3 + x)\Big]\\\\\\:\implies\sf 37 + x = 2 (11 + 2x) \\\\\\:\implies\sf 37 + x = 22 + 4x\\\\\\:\implies\sf 3x = 15\\\\\\:\implies\sf x = \cancel\dfrac{15}{3}\\\\\\:\implies{\underline{\boxed{\frak{\pink{x = 5}}}}}\;\bigstar\end{gathered} :⟹(37+x)=2[(8+x)+(3+x)] :⟹37+x=2(11+2x) :⟹37+x=22+4x :⟹3x=15 :⟹x= 3 15 :⟹ x=5 ★ ⠀⠀ \therefore{\underline{\textsf{After\;\textbf{5 years}\;his\;age\;will\;be\;twice\;as\;old\;sum\;of\;ages\;his\;sons.}}}∴ After5 yearshisagewillbetwiceasoldsumofageshissons.

24.

Q.7 Solve the following questo(i) Find the value of a & b that would make the Quadrilateral, a parallelogram 5a-13,8b,10b-3,3a-5

Answer»

Answer:

A man is 37 years old and his two sons are 8 years and 3 years old. After how many

years will he be twice as old as the sum of the ages of his sons?

Cheaters are stay away!!

Don't spam

Moderators and brainly stars are GIVE answers..

(In Explanation)

Step-by-step explanation:

❍ Let the number of years in which his age will be twice as old as the sum of his sons be x years respectively.

Present age of Man is 37 years old and Present age of his first son is 8 years old and second one is 3 years old.

Therefore,

— In x years their ages;

Age of Man = (37 + x)

Age of First son = (8 + x)

Age of YOUNGER son = (3 + x)

\rule{250px}{.3ex}

⠀⠀\qquad\quad{\underline{ \underline{ \pink{\bigstar\:\frak{ACCORDING \: to \: the \: Given \: Question :}}}}}

★AccordingtotheGivenQuestion:

⠀⠀

The age of FATHER will be twice as old as the sum of ages of his sons.

⠀⠀

Therefore,

⠀

★ Father's age = 2(Sum of ages of son) ★

⠀⠀

\begin{gathered}:\implies\sf (37 + x) = 2\Big[(8 + x) + (3 + x)\Big]\\\\\\:\implies\sf 37 + x = 2 (11 + 2x) \\\\\\:\implies\sf 37 + x = 22 + 4x\\\\\\:\implies\sf 3x = 15\\\\\\:\implies\sf x = \cancel\dfrac{15}{3}\\\\\\:\implies{\underline{\boxed{\frak{\pink{x = 5}}}}}\;\bigstar\end{gathered}

:⟹(37+x)=2[(8+x)+(3+x)]

:⟹37+x=2(11+2x)

:⟹37+x=22+4x

:⟹3x=15

:⟹x=

3

15

:⟹

x=5

★

⠀⠀

\therefore{\underline{\textsf{After\;\textbf{5 years}\;his\;age\;will\;be\;twice\;as\;old\;sum\;of\;ages\;his\;sons.}}}∴

After5 yearshisagewillbetwiceasoldsumofageshissons.

Discussion

25.	Given that sin 0=3/5, find cos 0 and tan 0-please help me with this and thank you all so much
Answer» Step-by-step EXPLANATION: COS0 = 4/5 tan0 = 3/4 is the ANSWER for above QUESTION

25.

Given that sin 0=3/5, find cos 0 and tan 0-please help me with this and thank you all so much

Answer»

Step-by-step EXPLANATION:

COS0 = 4/5

tan0 = 3/4 is the ANSWER for above QUESTION

Discussion

26.	Determine whether x and y in direct proportion and explain your answers y=×+2
Answer» ANSWER: We are here with you. Don't WORRY

26.

Determine whether x and y in direct proportion and explain your answers y=×+2

Answer»

ANSWER:

We are here with you. Don't WORRY

Discussion

27.	Continued factor√2453
Answer» ANSWER: is 11.302 bye bye Good NIGHT

27.

Continued factor√2453

Answer»

ANSWER:

is 11.302

bye bye

Good NIGHT

Discussion

28.	A horse is placed for a grazing inside a rectangular park 70m by 52m and is tethered (tied)to one cornor by a rope 35m long, find the area the horse can graze.
Answer» Answer: solution :- LENGTH of rope = 35 m it is given that park is in the SHAPE of rectangle then all its angle will be 90 DEGREE now , area grazed = area of sector or area of quadrant = 1/4 ×πr2 = 1/4 × 22/7 × 35 × 35 = 11×5×35/2 = 962.5m2 is this correct one ???

28.

A horse is placed for a grazing inside a rectangular park 70m by 52m and is tethered (tied)to one cornor by a rope 35m long, find the area the horse can graze.

Answer»

Answer:

solution :-

LENGTH of rope = 35 m

it is given that park is in the SHAPE of rectangle then all its angle will be 90 DEGREE

now ,

area grazed = area of sector or area of quadrant

= 1/4 ×πr2

= 1/4 × 22/7 × 35 × 35

= 11×5×35/2

= 962.5m2

is this correct one ???

Discussion

29.	If a+1/a=2, prove that a^2+1/a^2=a^4+1/a^4=a^3+1/a^3
Answer» ANSWER: Step-by-step EXPLANATION: a + 1/a = 2 (a+1/a)^2 = (2)^2 a^2 + 2 + 1/a^2 = 4 a^2 + 1/a^2 = 2 a^2 + 1/a^2 = a + 1/a = 2 (a^2 + 1/a^2) (a + 1/a) = 2x2 a^3 + a + 1/a + 1/a^3 =4 a^3 + 2 + 1/a^3 =4 a^3 + 1/a^3 = 2 (a^2 + 1/a^2)(a^2 + 1/a^2) = 2x2 a^4 + 2 + 1/a^4 = 4 a^4 + 1/a^4 = 2 a + 1/a = 2 = a^2 + 1/a^2 = a^3 + 1/a^3 = a^4 + 1/a^4 (PROVED)

29.

If a+1/a=2, prove that a^2+1/a^2=a^4+1/a^4=a^3+1/a^3

Answer»

ANSWER:

Step-by-step EXPLANATION:

a + 1/a = 2

(a+1/a)^2 = (2)^2

a^2 + 2 + 1/a^2 = 4

a^2 + 1/a^2 = 2

a^2 + 1/a^2 = a + 1/a = 2

(a^2 + 1/a^2) (a + 1/a) = 2x2

a^3 + a + 1/a + 1/a^3 =4

a^3 + 2 + 1/a^3 =4

a^3 + 1/a^3 = 2

(a^2 + 1/a^2)(a^2 + 1/a^2) = 2x2

a^4 + 2 + 1/a^4 = 4

a^4 + 1/a^4 = 2

a + 1/a

= 2

= a^2 + 1/a^2

= a^3 + 1/a^3

= a^4 + 1/a^4 (PROVED)

Discussion

30.	Aray of light falls on a plane mirror angle of 45° Through whatangle is it turned on reflection ?
Answer» Answer: 45° Step-by-step EXPLANATION: Angle of incidence = Angle of Reflection (MIRROR LAW) Angle i = Angle r Angle of incidence with the PLANE GIVEN = 45° Angle of incidence = 90°-45° Angle of reflection = 45° Also angle of reflection with the plane will be 45°

30.

Aray of light falls on a plane mirror angle of 45° Through whatangle is it turned on reflection ?

Answer»

Answer:

45°

Step-by-step EXPLANATION:

Angle of incidence = Angle of Reflection (MIRROR LAW)

Angle i = Angle r

Angle of incidence with the PLANE GIVEN = 45°

Angle of incidence = 90°-45°

Angle of reflection = 45°

Also angle of reflection with the plane will be 45°

Discussion

31.	Find the L. C. M by prime factorization method a. 22 and 44
Answer» Answer: Step 1 First we find and list the PRIME factors of 22 and 44 (Prime Factorization): Prime Factors of 22: 2, 11 Prime Factors of 44: 2, 2, 11 Step 2 Then we look at the frequency of the prime factors as they appear in each set above. List each prime factor the greatest number of times it OCCURS in either sets:2, 2, 11 Step 3 Finally, we multiply the prime numbers from Step 2 together.2 x 2 x 11 = 44 That's it. The LEAST Common Multiple (LCM) of 22 and 44 is 44.

31.

Find the L. C. M by prime factorization method a. 22 and 44

Answer»

Answer:

Step 1

First we find and list the PRIME factors of 22 and 44 (Prime Factorization):

Prime Factors of 22:

2, 11

Prime Factors of 44:

2, 2, 11

Step 2

Then we look at the frequency of the prime factors as they appear in each set above. List each prime factor the greatest number of times it OCCURS in either sets:2, 2, 11

Step 3

Finally, we multiply the prime numbers from Step 2 together.2 x 2 x 11 = 44

That's it. The LEAST Common Multiple (LCM) of 22 and 44 is 44.

Discussion

32.	4x^2-3x+7 answer it please
Answer» ANSWER: (4−7)(+1) Step-by-step EXPLANATION:

32.

4x^2-3x+7 answer it please

Answer»

ANSWER:

(4−7)(+1)

Step-by-step EXPLANATION:

Discussion

33.	If x=1 then find x for the given equation x+2y = 5
Answer» ANSWER: X + 2y = 5 2y = 5 - x. [ x = 1 ] 2y = 5 - 1 y = 4/2 y = 2. ️OR Step-by-step explanation: given, x + 2y = 5. [equation - 1] x = 1 [ equation-2] PUT VALUE of x in equation 1 x + 2y = 5 1 + 2y = 5 2y = 5 - 1 y = 4/2 y = 2. ANSWER..

33.

If x=1 then find x for the given equation x+2y = 5

Answer»

ANSWER:

X + 2y = 5

2y = 5 - x. [ x = 1 ]

2y = 5 - 1

y = 4/2

y = 2.

️OR

Step-by-step explanation:

given,

x + 2y = 5. [equation - 1]

x = 1 [ equation-2]

PUT VALUE of x in equation 1

x + 2y = 5

1 + 2y = 5

2y = 5 - 1

y = 4/2

y = 2.

ANSWER..

Discussion

34.	Finsnkskosjsoosjwgshajakalpalwjwhwhwjjwjkwkw
Answer» U JISNE answer diya hai . MUH se supaari nikaal KE baat kar

Discussion

35.	Simplify (X2 + 2X+ 3) (X2 − 3 ) (X − 1)
Answer» If your ANSWER is RIGHT than REPLY me

35.

Simplify (X2 + 2X+ 3) (X2 − 3 ) (X − 1)

Answer»

If your ANSWER is RIGHT than REPLY me

Discussion

36.	16. If A and B are two matrices, then which of the following statements is TRUE?A. (A + B)2 = A2 + 2AB + B2B. (A + B)2 # A2 + 2AB + B2C. (A - B)2 = A2 + 2AB + B2D. (A + B)2 = A2 – 2AB + B2
Answer» Answer: The correct answer is OPTION (A) A. (A + B)2 = A2 + 2AB + B2 Hope this answer will help you

36.

16. If A and B are two matrices, then which of the following statements is TRUE?A. (A + B)2 = A2 + 2AB + B2B. (A + B)2 # A2 + 2AB + B2C. (A - B)2 = A2 + 2AB + B2D. (A + B)2 = A2 – 2AB + B2

Answer»

Answer:

The correct answer is OPTION (A)

A. (A + B)2 = A2 + 2AB + B2

Hope this answer will help you

Discussion

37.	Find the values of k for which the quadratic equation (k+1) x2 – 2(k -1) x + 1 = 0 has real and equal roots
Answer» ${b }^{2} - 4ac = <klux>0</klux>$ this is the formula of 0 is equal real roots. this is also CALLED a Nature of roots.. Step-by-step explanation: we also knows as standard FORM of ${ax}^{2} + bx + c = 0$ then apply .. ${b}^{2} - 4ac = 0$

37.

Find the values of k for which the quadratic equation (k+1) x2 – 2(k -1) x + 1 = 0 has real and equal roots

Answer»

${b }^{2} - 4ac = <klux>0</klux>$

this is the formula of 0 is equal real roots. this is also CALLED a Nature of roots..

Step-by-step explanation:

we also knows as standard FORM of

${ax}^{2} + bx + c = 0$

then apply ..

${b}^{2} - 4ac = 0$

Discussion

38.	Construct Quadrilateral MORE if MO=6cm, OR=4.5cm,Angle M=60degree, Angle O=105degree,Angle R=105degree.
Answer» Step-by-step explanation: 1) Draw a LINE segment MO=6cm . 2) with M as centr make an arc on MO and make angle M =60degrees. 3) with o as CENTRE make angle O as 105degrees, and make a line segment. 4) with O as centre and radius 4.5 draw an arc on the line segment drawn in step 3 . 5) MARK it as R . 6)make AngleR=105degrees. 7) extend the line from point R to the line made by point M. 8)mark it as E. 9) MORE is constructed

38.

Construct Quadrilateral MORE if MO=6cm, OR=4.5cm,Angle M=60degree, Angle O=105degree,Angle R=105degree.

Answer»

Step-by-step explanation:

1) Draw a LINE segment MO=6cm .

2) with M as centr make an arc on MO and make angle M =60degrees.

3) with o as CENTRE make angle O as 105degrees, and make a line segment.

4) with O as centre and radius 4.5 draw an arc on the line segment drawn in step 3 .

5) MARK it as R .

6)make AngleR=105degrees.

7) extend the line from point R to the line made by point M.

8)mark it as E.

9) MORE is constructed

Discussion

39.	Solve the problems.(1) After 20 years, Suresh’s age will be 3 times of his present age, then find his present age.˜3™(2) In a bag, number of one rupee coin is three times than two rupees coin. If there are only Rs 150 in this bag, then find out the number of both the coins.˜4™(3) Perimeter of a rectangle is 24 meters. If length of a rectangle is 2 meters more than its breadth, then find the breadth of a rectangle.
Answer» Answer: 1 st one the ANS. is 60 age Step-by-step EXPLANATION: because it is 3 TIMES so, 20×3 is 60

39.

Solve the problems.(1) After 20 years, Suresh’s age will be 3 times of his present age, then find his present age.˜3™(2) In a bag, number of one rupee coin is three times than two rupees coin. If there are only Rs 150 in this bag, then find out the number of both the coins.˜4™(3) Perimeter of a rectangle is 24 meters. If length of a rectangle is 2 meters more than its breadth, then find the breadth of a rectangle.

Answer»

Answer:

1 st one

the ANS. is 60 age

Step-by-step EXPLANATION:

because it is 3 TIMES so, 20×3 is 60

Discussion

40.	EXERCISE 10.4Two circles of radii S cm and 3 cm intersect a two points and the distance betweentheir centres is 4 cm. Find the length of the common choid.
Answer» you are from which CLASS

Discussion

41.	the length of the hypotenuse of a right triangle the other two sides of which measure 9cm and 12cmद tool-x ऑफ ए राइट ट्रायंगल आर इक्वल एंड द स्क्वायर ऑफ इट्स इंपोर्टेंस ऑफ़ 50 डिग्री द लेंथ ऑफ एंड
Answer» Answer: 15 Step-by-step EXPLANATION:

41.

the length of the hypotenuse of a right triangle the other two sides of which measure 9cm and 12cmद tool-x ऑफ ए राइट ट्रायंगल आर इक्वल एंड द स्क्वायर ऑफ इट्स इंपोर्टेंस ऑफ़ 50 डिग्री द लेंथ ऑफ एंड

Answer»

Answer:

15

Step-by-step EXPLANATION:

Discussion

42.	3√4.2—2√12 + √20 / 3√18 – 2√27 + √45 =?
Answer» Answer: Step-by-step EXPLANATION: The answer is =12√18-6√20-3√50+8√45 =12√9×2-6√4×5-3√2×25+8√9×5 =36√2-12√5-15√2+24√5 taking LIKE terms =21√2+12√5 it can't be SOLVED now by taking value =29.698+ 26.832 =593.187 #Pari here...

42.

3√4.2—2√12 + √20 / 3√18 – 2√27 + √45 =?

Answer»

Answer:

Step-by-step EXPLANATION:

The answer is

=12√18-6√20-3√50+8√45

=12√9×2-6√4×5-3√2×25+8√9×5

=36√2-12√5-15√2+24√5

taking LIKE terms

=21√2+12√5

it can't be SOLVED now

by taking value

=29.698+ 26.832

=593.187

#Pari here...

Discussion

43.	4. How much tea at the rate of rs 16 per kg be mixed with 60 kg of tea at the rate of 24 perkg, so that the mixture is at the rate of 21 per kg? Find the gain percent by selling themixture at the rate of rs 22 per kg.(Ans. 36 kg, 4.76%)
Answer» Answer: 36, 24,4,22,7,,63,418w,2739,

43.

4. How much tea at the rate of rs 16 per kg be mixed with 60 kg of tea at the rate of 24 perkg, so that the mixture is at the rate of 21 per kg? Find the gain percent by selling themixture at the rate of rs 22 per kg.(Ans. 36 kg, 4.76%)

Answer»

Answer:

36,

24,4,22,7,,63,418w,2739,

Discussion

44.	12. Find the LCM and HCF of 12, 72 and 120 using prime factorisation.Also show that HCFⓇ LCM + Product of three given numbers.
Answer» ANSWER: there you GO! Step-by-step EXPLANATION:

44.

12. Find the LCM and HCF of 12, 72 and 120 using prime factorisation.Also show that HCFⓇ LCM + Product of three given numbers.

Answer»

ANSWER:

there you GO!

Step-by-step EXPLANATION:

Discussion

45.	488 +16224 +2528 = 1
Answer» Answer: howww WHTS the logic behind this?? UMM LET mehh THINK

45.

488 +16224 +2528 = 1

Answer»

Answer:

howww WHTS the logic behind this??

UMM LET mehh THINK

Discussion

46.	( 3 17 ) ( 3 12 ). X 3. 100
Answer» Answer: 550800 Step-by-step EXPLANATION: (317)(312)3100= 51363100= 5136300= 550800*

46.

( 3 17 ) ( 3 12 ). X 3. 100

Answer»

Answer:

550800

Step-by-step EXPLANATION:

(3*17)(3*12)*3*100=

51*36*3*100=

51*36*300=

550800

Discussion

47.	An angle formed by intersecting two lines measure 35° Find the measure of remaining all angle
Answer» Answer: 145 is your ANWSER PLZ MARK as BRAINLIST plz

47.

An angle formed by intersecting two lines measure 35° Find the measure of remaining all angle

Answer»

Answer:

145 is your ANWSER PLZ MARK as BRAINLIST plz

Discussion

48.	Cos10°cos50°cos70°=√3/8
Answer» Answer: The answer for this question is = ( COS 10 cos 50 )cos 70 = 1/2 (2cos10cos50) cos 70 = 1/2 (cos 60+cos 40) cos 70 WKT value of cos 60 is 1/2 . put the value in NEXT STEP =1/2 (1/2 + cos 40) cos 70 = 1/2 ( cos 70/2 +cos 70 cos 40) = 1/2 ( cos 70+cos 70 cos 40/2) = 1/4 (cos 70 + 2 cos 70 cos 40) = 1/4 (cos 70 + cos 110+ cos 30) = 1/4 ( cos 70+ cos 180-70 + cos 30) = 1/4 (cos 70- cos 70 + cos 30) = 1/4 * √3/2 = √3/8 hence PROVED Step-by-step explanation: Hope this answer help u!!!!! byee

48.

Cos10°cos50°cos70°=√3/8

Answer»

Answer:

The answer for this question is

= ( COS 10 cos 50 )cos 70

= 1/2 (2cos10cos50) cos 70

= 1/2 (cos 60+cos 40) cos 70

WKT value of cos 60 is 1/2 . put the value in NEXT STEP

=1/2 (1/2 + cos 40) cos 70

= 1/2 ( cos 70/2 +cos 70 cos 40)

= 1/2 ( cos 70+cos 70 cos 40/2)

= 1/4 (cos 70 + 2 cos 70 cos 40)

= 1/4 (cos 70 + cos 110+ cos 30)

= 1/4 ( cos 70+ cos 180-70 + cos 30)

= 1/4 (cos 70- cos 70 + cos 30)

= 1/4 * √3/2

= √3/8

hence PROVED

Step-by-step explanation:

Hope this answer help u!!!!! byee

Discussion

49.	Point M is the center of the circle shown. Point N lies on circle M.Which is closest to the area of the circle?
Answer» ANSWER: m is UR answer Step-by-step EXPLANATION: nwnshshzowksksj

49.

Point M is the center of the circle shown. Point N lies on circle M.Which is closest to the area of the circle?

Answer»

ANSWER:

m is UR answer

Step-by-step EXPLANATION:

nwnshshzowksksj

Discussion

50.	Give the answer below question
Answer» Answer: 22 Step-by-step explanation: SON present AGE is 22 is the answer for above QUESTION

50.

Give the answer below question

Answer»

Answer:

22

Step-by-step explanation:

SON present AGE is 22 is the answer for above QUESTION

Discussion

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