332354 + Interview Questions in Secondary School in Math

1.	Write a pair of irrational number whose sum is relational
Answer» Step-by-step EXPLANATION: NORMALLY,sum of any two irrational number is irratinal number.However,consider square root of 2 and -square root of 2.Their product is -2 ABD sum is 0 ,both of their of which all rational Sorry in my keyboad i have not the sign of square root where i have written tge square root of 2 yiu can WRITE it in the singn of square root and where i have written -square root of 2 first nark the sign of - and then square root and then write 2in the sign of square root

1.

Write a pair of irrational number whose sum is relational

Answer»

Step-by-step EXPLANATION:

NORMALLY,sum of any two irrational number is irratinal number.However,consider square root of 2 and -square root of 2.Their product is -2 ABD sum is 0 ,both of their of which all rational

Sorry in my keyboad i have not the sign of square root where i have written tge square root of 2 yiu can WRITE it in the singn of square root and where i have written -square root of 2 first nark the sign of - and then square root and then write 2in the sign of square root

Discussion

2.	( (i) ক্রয়মূল্যের উপর 20% লাভ হলে, বিক্রয়মূল্যের উপর শতকরা লাভ কত
Answer» ANSWER: I didn't UNDERSTAND this LANGUAGE.

2.

( (i) ক্রয়মূল্যের উপর 20% লাভ হলে, বিক্রয়মূল্যের উপর শতকরা লাভ কত

Answer»

ANSWER:

I didn't UNDERSTAND this LANGUAGE.

Discussion

3.	How to convert 376/25 in decimal
Answer» Answer: 15.04 ____________________________________________________________

3.

How to convert 376/25 in decimal

Answer»

Answer:

15.04

____________________________________________________________

Discussion

4.	Dy/dx+(2xtan-¹y-x³)(1+y²)=0 semister 2nd bsc
Answer» Given, $\frac{dy}{dx}+(2x\tan^{-<klux>1</klux>}y-x^3)(1+y^2)$ Dividing by (1 + y²) $\frac{1}{1+y^2}\frac{dy}{dx}+(2x\tan^{-1}y-x^3)=0\\\;\\\text{Putting}\;\tan^{ - 1}y=t\\\;\\\implies\frac{1}{1+y^2}\frac{dy}{dx}=\frac{dt}{dx}\\\;\\\textbf{On doing above substitutions,}\\\;\\\frac{dt}{dx}+2xt-x^3 = 0\\\;\\\frac{dt}{dx}+2xt=x^3$ This is the Linear Diffrentiatial EQUATION in t. $\text{I.F.}=e^{\int{2x\,dx}}\\\;\\\text{I.F.}=e^{x^2}$ Thus SOLUTION of this diffrentiatial equation will be, $t\times\text{I.F.}=\int{x^2\times \text{I.F.}\,dx}+c\\\;\\t\times e^{x^2}=\int{x^3e{x^2}\,dx}+c\\\;\\te^{x^2}=e^{x^2}(x^2-1)+c\\\;\\\textbf{Putting the value of t,}\\\;\\e^{x^2}\tan^{-1}y=e^{x^2}(x^2-1)+c$ This is the REQUIRED General Solution of given Diffrentiatial Equation.

4.

Dy/dx+(2xtan-¹y-x³)(1+y²)=0 semister 2nd bsc

Answer»

Given,

$\frac{dy}{dx}+(2x\tan^{-<klux>1</klux>}y-x^3)(1+y^2)$

Dividing by (1 + y²)

$\frac{1}{1+y^2}\frac{dy}{dx}+(2x\tan^{-1}y-x^3)=0\\\;\\\text{Putting}\;\tan^{ - 1}y=t\\\;\\\implies\frac{1}{1+y^2}\frac{dy}{dx}=\frac{dt}{dx}\\\;\\\textbf{On doing above substitutions,}\\\;\\\frac{dt}{dx}+2xt-x^3 = 0\\\;\\\frac{dt}{dx}+2xt=x^3$

This is the Linear Diffrentiatial EQUATION in t.

$\text{I.F.}=e^{\int{2x\,dx}}\\\;\\\text{I.F.}=e^{x^2}$

Thus SOLUTION of this diffrentiatial equation will be,

$t\times\text{I.F.}=\int{x^2\times \text{I.F.}\,dx}+c\\\;\\t\times e^{x^2}=\int{x^3e{x^2}\,dx}+c\\\;\\te^{x^2}=e^{x^2}(x^2-1)+c\\\;\\\textbf{Putting the value of t,}\\\;\\e^{x^2}\tan^{-1}y=e^{x^2}(x^2-1)+c$

This is the REQUIRED General Solution of given Diffrentiatial Equation.

Discussion

5.	What is the formula of Trapazium
Answer» PERIMETER = 4×SIDE Area= 0.5* HEIGHT*SUM of PARALLEL side

5.

What is the formula of Trapazium

Answer»

PERIMETER = 4×SIDE

Area= 0.5* HEIGHT*SUM of PARALLEL side

Discussion

6.	kirti thinks a number and subtracts 3/2 from it . she multiply 6 to the result obtained . the final number obtained is three times the same number . she thought of. what is original number ?
Answer» ANSWER: LET the no be X (x-3/2)6=3X (2x-3)6 =3x 2 2x-3= 3x/3 2x-x=3 x=3

6.

kirti thinks a number and subtracts 3/2 from it . she multiply 6 to the result obtained . the final number obtained is three times the same number . she thought of. what is original number ?

Answer»

ANSWER:

LET the no be X

(x-3/2)6=3X

(2x-3)6 =3x

2

2x-3= 3x/3

2x-x=3

x=3

Discussion

7.	HCF of 398 436 and 542 in division method
Answer» Step-by-step explanation: we need to find the LARGEST number that will DIVIDE 398,436,542 leaving REMAINDERS 7,11,15 respectively hence,we need to find the HCF of three numbers (398-7)=391 (436-11)=425 (542-15)=527 There fore HCF of (391,425,527)=17

7.

HCF of 398 436 and 542 in division method

Answer»

Step-by-step explanation:

we need to find the LARGEST number that will DIVIDE 398,436,542 leaving REMAINDERS 7,11,15 respectively

hence,we need to find the HCF of three numbers

(398-7)=391

(436-11)=425

(542-15)=527

There fore HCF of (391,425,527)=17

Discussion

8.	Full form of coc⚔️⚔️ᏒᏗᎷ ᏰᏂᏦᏖ⚔️⚔️
Answer» Step-by-step EXPLANATION: *FULL* *FORM* OF *COC=CLASH* OF *CLANS.... HOPE* IT *HELPED* ✌️❤️❤️ GN

8.

Full form of coc⚔️⚔️ᏒᏗᎷ ᏰᏂᏦᏖ⚔️⚔️

Answer»

Step-by-step EXPLANATION:

FULL FORM OF COC=CLASH OF CLANS....

HOPE IT HELPED ✌️❤️❤️

GN

Discussion

9.	Factories x^2-3x^2-9x-5
Answer» Answer: 2x-6x-9x-5 x(2-6-9)-5

9.

Factories x^2-3x^2-9x-5

Answer»

Answer:

2x-6x-9x-5

x(2-6-9)-5

Discussion

10.	Find the remainder when x³-3x²+4x-5 is divided by x-2
Answer» HOPE this POST will HELP u Friends PLEASE FOLLOW me

10.

Find the remainder when x³-3x²+4x-5 is divided by x-2

Answer»

HOPE this POST will HELP u

Friends PLEASE FOLLOW me

Discussion

11.	(x+1/2)^2 - (x-1/2)^2
Answer» ANSWER: not QUITE sure Step-by-step EXPLANATION:

11.

(x+1/2)^2 - (x-1/2)^2

Answer»

ANSWER:

not QUITE sure

Step-by-step EXPLANATION:

Discussion

12.	Two examples of reapting rational number
Answer» Heya!!! here is your answer=> 1/7= 0. 142 857......(6 repeating DIGITS) 2/11=0.18....(2 repeating digits) plz MARK me as brainliest

12.

Two examples of reapting rational number

Answer»

Heya!!!

here is your answer=>

1/7= 0. 142 857......(6 repeating DIGITS)

2/11=0.18....(2 repeating digits)

plz MARK me as brainliest

Discussion

13.	Amar& Biren working together 36 years,chandar & Amar working together 22 years,chandar & Biren working together 28 years.how many years they working
Answer» Answer: 1/36+1/22+1/28=302/2772 =1386/151days

13.

Amar& Biren working together 36 years,chandar & Amar working together 22 years,chandar & Biren working together 28 years.how many years they working

Answer»

Answer:

1/36+1/22+1/28=302/2772

=1386/151days

Discussion

14.	Please send these answer
Answer» ANSWER: The answer is 4/3 Step-by-step EXPLANATION:

14.

Please send these answer

Answer»

ANSWER:

The answer is 4/3

Step-by-step EXPLANATION:

Discussion

15.	3 और 4 के बीच 6 परिमेय संख्या ज्ञात कीजिए
Answer» ANSWER: UMMM ENGLISHS plz Step-by-step EXPLANATION:

15.

3 और 4 के बीच 6 परिमेय संख्या ज्ञात कीजिए

Answer»

ANSWER:

UMMM ENGLISHS plz

Step-by-step EXPLANATION:

Discussion

16.	. Which of the following is the product of7/8 and -4/21 ? PLEASE GIVE ANSWER WITH METHOD....
Answer» Answer: The ASNWER is 8- Step-by-step EXPLANATION: idk the METHOD HONESTLY

16.

. Which of the following is the product of7/8 and -4/21 ? PLEASE GIVE ANSWER WITH METHOD....

Answer»

Answer:

The ASNWER is 8-

Step-by-step EXPLANATION:

idk the METHOD HONESTLY

Discussion

17.	Rationalize the denominator and find the value (5+2√3)/7+4√3
Answer» Answer: 11-6√3 Step-by-step EXPLANATION:

17.

Rationalize the denominator and find the value (5+2√3)/7+4√3

Answer»

Answer:

11-6√3

Step-by-step EXPLANATION:

Discussion

18.	Cos(A-B)=cosA.cosB+sinA.sinB find the valueA=B=60°
Answer» ANSWER: this is the attachment Step-by-step EXPLANATION: HOPE it hepls

18.

Cos(A-B)=cosA.cosB+sinA.sinB find the valueA=B=60°

Answer»

ANSWER:

this is the attachment

Step-by-step EXPLANATION:

HOPE it hepls

Discussion

19.	Find the product of following expand [2x +3y] 2x+3y ]
Answer» ANSWER: Step-by-step EXPLANATION: (2X+3y)^2 (a+b)^2 = a^2+2ab+b^2 2x^2+22x3y+3y^2 4x^2+12xy+9y^2 hope this will be HELPFUL

19.

Find the product of following expand [2x +3y] 2x+3y ]

Answer»

ANSWER:

Step-by-step EXPLANATION:

(2X+3y)^2

(a+b)^2 = a^2+2ab+b^2

2x^2+2*2x*3y+3y^2

4x^2+12xy+9y^2

hope this will be HELPFUL

Discussion

20.	X x x + 4 Y is equal to 12 and a + b x + 2 a minus B Y is equal to 5 a - 1
Answer» ANSWER: CALCULATOR N this WRLD Step-by-step EXPLANATION:

20.

X x x + 4 Y is equal to 12 and a + b x + 2 a minus B Y is equal to 5 a - 1

Answer»

ANSWER:

CALCULATOR N this WRLD

Step-by-step EXPLANATION:

Discussion

21.	Mcq please give answer of my question
Answer» ANSWER: . 1 () . 2.()

21.

Mcq please give answer of my question

Answer»

ANSWER:

. 1 () . 2.()

Discussion

22.	3 root 2 - 2 root 3explain with steps
Answer» ANSWER: √18-√12 Step-by-step explanation: 3√2-2√3 √18-√12

22.

3 root 2 - 2 root 3explain with steps

Answer»

ANSWER:

√18-√12

Step-by-step explanation:

3√2-2√3

√18-√12

Discussion

23.	Round off nearest 10 Million
Answer» ROUNDING off to the nearest ten million (10,000,000): If the digit in the one million's place in a number is 5, 6, 7, 8 or 9 then round to the nearest MULTIPLE of ten million which is greater than the given number. Thus, to round off numbers to the nearest ten million, LOOK at the digit in the one million place.

23.

Round off nearest 10 Million

Answer»

ROUNDING off to the nearest ten million (10,000,000):

If the digit in the one million's place in a number is 5, 6, 7, 8 or 9 then round to the nearest MULTIPLE of ten million which is greater than the given number. Thus, to round off numbers to the nearest ten million, LOOK at the digit in the one million place.

Discussion

24.	Which of the following are the solutions of 2x²-5x-3=0 ?i)x=-1 ii) x = 1/3 iii) x = -1/2 iv) x = 2 v) x=5 vi)x = 1/2
Answer» ANSWER: X=1/2 this is the ACTUAL answer of your QUESTION

24.

Which of the following are the solutions of 2x²-5x-3=0 ?i)x=-1 ii) x = 1/3 iii) x = -1/2 iv) x = 2 v) x=5 vi)x = 1/2

Answer»

ANSWER:

X=1/2

this is the ACTUAL answer of your QUESTION

Discussion

25.	2. If two apples and a pear cost 7,and two pear and an apple cost 8,how much does an orange cost if apear and two oranges cost 11?(All numbers are rupees)
Answer» ANSWER: 3 is the answer !!!!!!!!!!

25.

2. If two apples and a pear cost 7,and two pear and an apple cost 8,how much does an orange cost if apear and two oranges cost 11?(All numbers are rupees)

Answer»

ANSWER:

3 is the answer !!!!!!!!!!

Discussion

26.	A circle has a radius of 5cm find its diameter
Answer» Step-by-step EXPLANATION: RADIUS = 5cm Diameter = 2 × radius = 2 ×5 = 10 cm

26.

A circle has a radius of 5cm find its diameter

Answer»

Step-by-step EXPLANATION:

RADIUS = 5cm

Diameter = 2 × radius = 2 ×5 = 10 cm

Discussion

27.	Abahi lockdown kitna badha ga
Answer» ANSWER: GOD KNOWS DEAR.......

27.

Abahi lockdown kitna badha ga

Answer»

ANSWER:

GOD KNOWS DEAR.......

Discussion

28.	find the area of part 2 metre wide lady inside along the boundary of a rectangular Park of dimensionshundred into 60 M find the cost of levelling it @ rupees 30 square metre
Answer» Step-by-step EXPLANATION: MARK my ANS as BRAINLIEST PLZZZ

28.

find the area of part 2 metre wide lady inside along the boundary of a rectangular Park of dimensionshundred into 60 M find the cost of levelling it @ rupees 30 square metre

Answer»

Step-by-step EXPLANATION:

MARK my ANS as BRAINLIEST PLZZZ

Discussion

29.	Help me Please i dont understand this.
Answer» ANSWER: HEY! MATE Here is your SOLUTION. THANKS

29.

Help me Please i dont understand this.

Answer»

ANSWER:

HEY! MATE Here is your SOLUTION. THANKS

Discussion

30.	Please also give my answer also
Answer» Answer: 6x + 3y = 6xy divide each term with xy , =>6/y + 3/X = 6 ---( 1 ) 2x + 4y = 5xy divide each term with xy , we get => 2/y + 4/x = 5 ---( 2 ) Let 1/x = a , 1/y = b 6/y + 3/x = 6 => 6b + 3a = 6 ---( 3 ) 2/y + 4/x = 5 => 2b + 4a = 5 ----( 4 ) In equation (4) , multiply 3 in each SIDE... we get, 6b+12a=15.......(4) from equation(3) and (4), we get 6b + 3a = 6 6b + 12a = 15 __________ -9A = -9 a = ( -9 )/( -9 ) a = 1 PUT the value of a in equation (4), we get... 2b + 4 = 5 2b = 5 - 4 b = 1/2 Now we get the value of a and b.... Therefore , 1/x = a = 1 =>x = 1 , 1/y = b = 1/2 => y = 2 Hope it will HELP you ✌️

30.

Please also give my answer also

Answer»

Answer:

6x + 3y = 6xy

divide each term with xy ,

=>6/y + 3/X = 6 ---( 1 )

2x + 4y = 5xy

divide each term with xy , we get

=> 2/y + 4/x = 5 ---( 2 )

Let 1/x = a , 1/y = b

6/y + 3/x = 6 => 6b + 3a = 6 ---( 3 )

2/y + 4/x = 5 => 2b + 4a = 5 ----( 4 )

In equation (4) , multiply 3 in each SIDE...

we get,

6b+12a=15.......(4)

from equation(3) and (4), we get

6b + 3a = 6

6b + 12a = 15

__________

-9A = -9

a = ( -9 )/( -9 )

a = 1

PUT the value of a in equation (4), we get...

2b + 4 = 5

2b = 5 - 4

b = 1/2

Now we get the value of a and b....

Therefore ,

1/x = a = 1 =>x = 1 ,

1/y = b = 1/2 => y = 2

Hope it will HELP you ✌️

Discussion

31.	If ‘+’ means ‘×’, ‘-‘ means ‘+’, ‘×’ means ‘÷’ and ‘÷’ means ‘-‘ then find the value of;6 – 9 + 8 × 3 ÷ 20 = ……. . A. 6 B. 10 C. -2 D. 12
Answer» Answer: 10 Step-by-step EXPLANATION: +=× -=+ ×=÷ ÷=- 6+9×8÷3-20 6+72÷3-20 6+24-20 6+4 =10 *option*** B 10

31.

If ‘+’ means ‘×’, ‘-‘ means ‘+’, ‘×’ means ‘÷’ and ‘÷’ means ‘-‘ then find the value of;6 – 9 + 8 × 3 ÷ 20 = ……. . A. 6 B. 10 C. -2 D. 12

Answer»

Answer:

10

Step-by-step EXPLANATION:

+=×

-=+

×=÷

÷=-

6+9×8÷3-20

6+72÷3-20

6+24-20

6+4

=10

option B 10

Discussion

32.	X + x × 3 = 12. Find x
Answer» Answer: 2 Step-by-step explanation: 2x ×3=12 6x=12 X=12/6 2

32.

X + x × 3 = 12. Find x

Answer»

Answer:

2

Step-by-step explanation:

2x ×3=12

6x=12

X=12/6

2

Discussion

33.	2. Find the gravitational potential energy of 1 kgmass kept at a height of 5 m above the ground.Calculate its kinetic energy when it falls and hits theground. Take g = 10 m s2. Ans. 50 J, 50 J
Answer» Answer: 50 J Step-by-step explanation: Potential energy = m × g × h Energy = 1 × 10 × 5 Hence, potential energy = 50 J

33.

2. Find the gravitational potential energy of 1 kgmass kept at a height of 5 m above the ground.Calculate its kinetic energy when it falls and hits theground. Take g = 10 m s2. Ans. 50 J, 50 J

Answer»

Answer:

50 J

Step-by-step explanation:

Potential energy = m × g × h

Energy = 1 × 10 × 5

Hence, potential energy = 50 J

Discussion

34.	1. Can you identify the nextnumber in the following sequenceof numbers 132611572428334?
Answer» (3874648488484+28837474

Discussion

35.	3 compure each of the0 30+ (-25) +1-10)
Answer» ANSWER: -4 is the CORRECT answer

35.

3 compure each of the0 30+ (-25) +1-10)

Answer»

ANSWER:

-4 is the CORRECT answer

Discussion

36.	The sum of the series 20 20 20 20 200 1 2 3 10 C C C C C      .......... is1. 20C10 2.  20 C10 3.  201012 C 4. 0
Answer» ANSWER: djdfNDFFJthhgfcgdgshwuwhshs Step-by-step EXPLANATION: kolistha kulaste PURR purr

36.

The sum of the series 20 20 20 20 200 1 2 3 10 C C C C C      .......... is1. 20C10 2.  20 C10 3.  201012 C 4. 0

Answer»

ANSWER:

djdfNDFFJthhgfcgdgshwuwhshs

Step-by-step EXPLANATION:

kolistha kulaste PURR purr

Discussion

37.	B respresents which number on the number line?
Answer» ANSWER: -1.4 Hope it HELPS you. PLZ MARK it as BRAINLIEST.

37.

B respresents which number on the number line?

Answer»

ANSWER:

-1.4

Hope it HELPS you.

PLZ MARK it as BRAINLIEST.

Discussion

38.	Date :Page No.:14 = -10 + 4 = x + 11 = X 1160277 = lo +52 - x + 1 + 1 = XML329= 10 + 10+ Cio-D = x+ Xt1xlot tlll = 14
Answer» Step-by-step EXPLANATION: what is the QUESTION?CANT UNDERSTAND...

38.

Date :Page No.:14 = -10 + 4 = x + 11 = X 1160277 = lo +52 - x + 1 + 1 = XML329= 10 + 10+ Cio-D = x+ Xt1xlot tlll = 14

Answer»

Step-by-step EXPLANATION:

what is the QUESTION?CANT UNDERSTAND...

Discussion

39.	Find the length of the side of the square whose area is 7.1536 long division method
Answer» Answer: 2.674 answer Step-by-step EXPLANATION: we know that area of SQUARE (side)^2 let LENGTH of each side of square = x so putting the value then answer is 2.674

39.

Find the length of the side of the square whose area is 7.1536 long division method

Answer»

Answer:

2.674 answer

Step-by-step EXPLANATION:

we know that

area of SQUARE (side)^2

let LENGTH of each side of square = x

so putting the value

then answer is 2.674

Discussion

40.	Please answer these questions with full method
Answer» Step-by-step EXPLANATION: Here's your answer. Hope it helps. please FOLLOW me. mark it as BRAINLIEST

40.

Please answer these questions with full method

Answer»

Step-by-step EXPLANATION:

Here's your answer.

Hope it helps.

please FOLLOW me.

mark it as BRAINLIEST

Discussion

41.	The area of a square is 49 units square. What is the perimeter of the faces of the square???
Answer» ANSWER: Hey mate here is your answer..... AREA of square = 49 square units a² = 49 a = √49 = 7 Perimeter = 4×a = 4×7 = 28 units Hope it helps you.....

41.

The area of a square is 49 units square. What is the perimeter of the faces of the square???

Answer»

ANSWER:

Hey mate here is your answer.....

AREA of square = 49 square units

a² = 49

a = √49 = 7

Perimeter = 4×a = 4×7 = 28 units

Hope it helps you.....

Discussion

42.	Kiersten runs a website that helps people learn programming. Every month, Kiersten receives a subscription fee of $10 from each of the subscribers to her website. Last month, the website had 100 subscribers. This month, 30 new members joined the website, and 10 members cancelled their subscription.How much money will Kiersten’s online business earn this month?
Answer» Answer: 1200$ Step-by-step explanation: 10$ * 100 SUBS = 1000$ 10$ * 30 subs =300$ 1300$, 10 subs left so 100 $gone =1200$

42.

Kiersten runs a website that helps people learn programming. Every month, Kiersten receives a subscription fee of $10 from each of the subscribers to her website. Last month, the website had 100 subscribers. This month, 30 new members joined the website, and 10 members cancelled their subscription.How much money will Kiersten’s online business earn this month?

Answer»

Answer:

1200$

Step-by-step explanation:

10$ * 100 SUBS = 1000$

10$ * 30 subs =300$

1300$, 10 subs left so 100 $gone

=1200$

Discussion

43.	80×1/16×1/8×1/4×1/2×16
Answer» ANSWER: USE a calculator Step-by-step EXPLANATION:

43.

80×1/16×1/8×1/4×1/2×16

Answer»

ANSWER:

USE a calculator

Step-by-step EXPLANATION:

Discussion

44.	Solve 2x-3y=6,x+y=1
Answer» ANSWER: x=9/5y=-4/5 Step-by-step explanation: 2x-3y=6-------eqn 1 x+y1-------eqn 2 add EQUN 1+3times of TWO i.e, 2x-3y+3x+3y=9 i.e, 5x=9 i.x=9/5 put x=9/5 in eqn. 2 to GET y=1-9/5=-4/5

44.

Solve 2x-3y=6,x+y=1

Answer»

ANSWER:

x=9/5y=-4/5

Step-by-step explanation:

2x-3y=6-------eqn 1

x+y1-------eqn 2

add EQUN 1+3times of TWO

i.e, 2x-3y+3x+3y=9

i.e, 5x=9

i.x=9/5

put x=9/5 in eqn. 2 to GET

y=1-9/5=-4/5

Discussion

45.	On comparing the ratios a1a2, b1b2 and c1c2 , find out whether the pair equations 2x-6y+10=0 and 3x-9y+15=0 are intersecting, coincident or parallel.
Answer» Answer: Let A1= 2 b1 = -6 c1 = 10 a2 = 3 B2 = - 9 c2 = 15 Step-by-step explanation: Now, comparing a1/a2 = 2/3 b1/b2 = -6/-9 = 2/3 c1/c2 = 10/15 = 2/3 Hence it is coincident.

45.

On comparing the ratios a1a2, b1b2 and c1c2 , find out whether the pair equations 2x-6y+10=0 and 3x-9y+15=0 are intersecting, coincident or parallel.

Answer»

Answer:

Let A1= 2 b1 = -6 c1 = 10

a2 = 3 B2 = - 9 c2 = 15

Step-by-step explanation:

Now,

comparing

a1/a2 = 2/3

b1/b2 = -6/-9 = 2/3

c1/c2 = 10/15 = 2/3

Hence it is coincident.

Discussion

46.	Please also give these answer with full method
Answer» Step-by-step EXPLANATION: Here's your answer. Hope it helps. please FOLLOW me mark it as BRAINLIEST

46.

Please also give these answer with full method

Answer»

Step-by-step EXPLANATION:

Here's your answer.

Hope it helps.

please FOLLOW me

mark it as BRAINLIEST

Discussion

47.	find the equation of circle which passes through origin and intercept on co-ordinate Axes are three and four respectively
Answer» Answer: use formula of CIRCLE in DIAMETRE FORM since INSCRIBED ANGLE is made Step-by-step explanation: (3,0) and (0,4)

47.

find the equation of circle which passes through origin and intercept on co-ordinate Axes are three and four respectively

Answer»

Answer:

use formula of CIRCLE in DIAMETRE FORM since INSCRIBED ANGLE is made

Step-by-step explanation:

(3,0) and (0,4)

Discussion

48.	I'm looking for help on this question with step to step. thanks :)
Answer» Mean height of plant is 30.5 cm. Step-by-step explanation: We are given the data about the heights (h in cm) of the plants below ; Height of plants (h) Mid-point (X) Frequency (f) $X \times f$ 0 < h < 10 5 1 5 10 < h < 20 15 4 60 20 < h < 30 25 7 175 30 < h < 40 35 2 70 40 < h < 50 45 3 135 50 < h < 60 55 3 165 Total 20 610 Here, mid-point is CALCULATED by the following formula; Mid-point for 0 < h < 10 = $\frac{\text{Upper limit + Lower Limit}}{2}$ = $\frac{10+0}{2} =5$ Now, the mean for any frequency distribution is given by the following formula; Mean, $\bar X$ = $\frac{\sum X\times f}{\sum f}$ = $\frac{610}{20}$ = 30.5 cm Hence, by USING midpoints of each group, the mean height of a plant is 30.5 cm.

48.

I'm looking for help on this question with step to step. thanks :)

Answer»

Mean height of plant is 30.5 cm.

Step-by-step explanation:

We are given the data about the heights (h in cm) of the plants below ;

Height of plants (h) Mid-point (X) Frequency (f) $X \times f$

0 < h < 10 5 1 5

10 < h < 20 15 4 60

20 < h < 30 25 7 175

30 < h < 40 35 2 70

40 < h < 50 45 3 135

50 < h < 60 55 3 165

Total 20 610

Here, mid-point is CALCULATED by the following formula;

Mid-point for 0 < h < 10 = $\frac{\text{Upper limit + Lower Limit}}{2}$

= $\frac{10+0}{2} =5$

Now, the mean for any frequency distribution is given by the following formula;

Mean, $\bar X$ = $\frac{\sum X\times f}{\sum f}$

= $\frac{610}{20}$ = 30.5 cm

Hence, by USING midpoints of each group, the mean height of a plant is 30.5 cm.

Discussion

49.	Solve it fast i ll mark brainliest
Answer» To Prove : $\tt\frac{1 + \cos \: A}{1 - \cos \: A} = \frac{ { \tan }^{2}A}{ { (\sec A- 1) }^{2} }$ Solution : LET's try to Prove RHS = LHS. Taking RHS $\tt \dashrightarrow \frac{ {\tan }^{2} A }{ { (\sec A - 1)}^{2} }$ $\tt \dashrightarrow \frac{ ( { \sec }^{2} A - 1) }{{( \sec A- 1 ) }^{2} }$ $\tt \dashrightarrow \frac{( \sec A + 1)( \sec A - 1)}{( \sec A - 1)( \sec a - 1)}$ $\tt \dashrightarrow \frac{( \sec A + 1)}{( \sec A - 1)}$ $\tt \dashrightarrow \frac{ \frac{1 + \cos A}{ \cos A} }{ \frac{1 - \cos A}{ \cos A}}$ $\tt \dashrightarrow \frac{1 + \cos \: A}{1 - \cos \: A}$ HENCE Proved. Other method, Provide in attachment. $\rule{200}3$ $\boxed{\begin{minipage}{7 cm}Fundamental Trigonometric Identities \\ \\ $\sin^2\theta + \cos^2\theta=1 \\ \\ 1+\tan^2\theta = \sec^2\theta \\ \\ 1 + \cot^2\theta = \text{cosec}^2 \, \theta$\end{minipage}}$

49.

Solve it fast i ll mark brainliest

Answer»

To Prove :

$\tt\frac{1 + \cos \: A}{1 - \cos \: A} = \frac{ { \tan }^{2}A}{ { (\sec A- 1) }^{2} }$

Solution :

LET's try to Prove RHS = LHS.

Taking RHS

$\tt \dashrightarrow \frac{ {\tan }^{2} A }{ { (\sec A - 1)}^{2} }$

$\tt \dashrightarrow \frac{ ( { \sec }^{2} A - 1) }{{( \sec A- 1 ) }^{2} }$

$\tt \dashrightarrow \frac{( \sec A + 1)( \sec A - 1)}{( \sec A - 1)( \sec a - 1)}$

$\tt \dashrightarrow \frac{( \sec A + 1)}{( \sec A - 1)}$

$\tt \dashrightarrow \frac{ \frac{1 + \cos A}{ \cos A} }{ \frac{1 - \cos A}{ \cos A}}$

$\tt \dashrightarrow \frac{1 + \cos \: A}{1 - \cos \: A}$

HENCE Proved.

Other method, Provide in attachment.

$\rule{200}3$

$\boxed{\begin{minipage}{7 cm}Fundamental Trigonometric Identities \\ \\ $\sin^2\theta + \cos^2\theta=1 \\ \\ 1+\tan^2\theta = \sec^2\theta \\ \\ 1 + \cot^2\theta = \text{cosec}^2 \, \theta$\end{minipage}}$

Discussion

50.	Factories 5X2-4-8X
Answer» Step-by-step EXPLANATION: $5 {x}^{2} - 8x - 4 \\ 5 {x}^{2} - 10x + 2x - 4 \\ 5x(x - 2) + 2(x - 2) \\ (x - 2)(5x + 2)$ This is your ANSWER...

50.

Factories 5X2-4-8X

Answer»

Step-by-step EXPLANATION:

$5 {x}^{2} - 8x - 4 \\ 5 {x}^{2} - 10x + 2x - 4 \\ 5x(x - 2) + 2(x - 2) \\ (x - 2)(5x + 2)$

This is your ANSWER...

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