332354 + Interview Questions in Secondary School in Math

1.	Show that the relation R in the set of natural number N given by R ={(x,y):x is odd and y=2x}is an equivalence relation
Answer» Answer: Here X is odd number so R = {(1,2), (3,6), (5,10),....} so this relation is not reflexive because (x,x) does not belongs to R. this relation is also not SYMMETRIC because (x,y) belongs to R but (y,x) does not belongs to R. this relation is also not transitive because (x,y) belongs to R but (y,z) and (x,z) does not belongs to R. so this relation is not equivalence. MAY YOUR QUESTION IS WRONG

1.

Show that the relation R in the set of natural number N given by R ={(x,y):x is odd and y=2x}is an equivalence relation

Answer»

Answer:

Here X is odd number so

R = {(1,2), (3,6), (5,10),....}

so this relation is not reflexive because (x,x) does not belongs to R.

this relation is also not SYMMETRIC because (x,y) belongs to R but (y,x) does not belongs to R.

this relation is also not transitive because (x,y) belongs to R but (y,z) and (x,z) does not belongs to R.

so this relation is not equivalence.

MAY YOUR QUESTION IS WRONG

Discussion

2.	Y/4 +1/2=5solve the following
Answer» ANSWER: Y/4 + 1/2= 5 Y+2/4 = 5 y+2= 20 y=18

2.

Y/4 +1/2=5solve the following

Answer»

ANSWER:

Y/4 + 1/2= 5

Y+2/4 = 5

y+2= 20

y=18

Discussion

3.	How can we identify the three types of mirror without touching
Answer» Answer: Look into each MIRROR, the NATURE of the IMAGE produced will tell you the type of mirror it is. - A plane mirror will PRODUCE an image of the same SIZE as your face. - A concave mirror will produce a magnified image of your face. - A convex mirror will produce a diminished image of your face.

3.

How can we identify the three types of mirror without touching

Answer»

Answer:

Look into each MIRROR, the NATURE of the IMAGE produced will tell you the type of mirror it is. - A plane mirror will PRODUCE an image of the same SIZE as your face. - A concave mirror will produce a magnified image of your face. - A convex mirror will produce a diminished image of your face.

Discussion

4.	Define concurrent lines
Answer» Answer: Concurrent-lines. A set of lines or curves are said to be concurrent if they all intersect. at the same POINT. In the figure below, the three lines are concurrent because they all intersect at a SINGLE point P. The point P is CALLED the "point of concurrency". hope it HELPS

4.

Define concurrent lines

Answer»

Answer:

Concurrent-lines. A set of lines or curves are said to be concurrent if they all intersect. at the same POINT. In the figure below, the three lines are concurrent because they all intersect at a SINGLE point P. The point P is CALLED the "point of concurrency".

hope it HELPS

Discussion

5.	5*5=8 plz solve my problem
Answer» ANSWER: Its so EASY 55 = 25 Step-by-step EXPLANATION:*

5.

5*5=8 plz solve my problem

Answer»

ANSWER:

Its so EASY 5*5 = 25

Step-by-step EXPLANATION:

Discussion

6.	Simplify using laws of exponents and write the answer in exponential form.: (25)^3/2 x (243)^2/5 / (16)^5/4 x (8)^4/3
Answer» ANSWER: (5^3 )^3/2 × (3^5)^2/5×*2^2)^5/4 ×(2^3)^4/3=125×9×32×16= 576.,000

6.

Simplify using laws of exponents and write the answer in exponential form.: (25)^3/2 x (243)^2/5 / (16)^5/4 x (8)^4/3

Answer»

ANSWER:

(5^3 )^3/2 × (3^5)^2/5×*2^2)^5/4 ×(2^3)^4/3=125×9×32×16= 576.,000

Discussion

7.	Factorise by splitting middle term 3x^2-7x+2
Answer» Step-by-step explanation: 3x² - 7X +2 = 3x² - 6X - X +2 = 3x (x - 2) -1 (x - 2) = (x - 2) (3x - 1)

7.

Factorise by splitting middle term 3x^2-7x+2

Answer»

Step-by-step explanation:

3x² - 7X +2

= 3x² - 6X - X +2

= 3x (x - 2) -1 (x - 2)

= (x - 2) (3x - 1)

Discussion

8.	A b and CD are two parallel chords of a circle which are on opposite sides of the centre such that a b is equal to 10 cm CD is 24 cm and the distance between a b and CD is 17 cm find the radius of the circlePlease answer fast
Answer» Answer: 13 cm Step-by-step EXPLANATION: HOPE it HELPS you PLZ FOLLOW me

8.

A b and CD are two parallel chords of a circle which are on opposite sides of the centre such that a b is equal to 10 cm CD is 24 cm and the distance between a b and CD is 17 cm find the radius of the circlePlease answer fast

Answer»

Answer:

13 cm

Step-by-step EXPLANATION:

HOPE it HELPS you

PLZ FOLLOW me

Discussion

9.	15) The first Republic Day of India was celebrated on 26th January, 1950. It was:a) Tuesdayb) WednesdayThursday d) Friday
Answer» Answer: C)THURSDAY Step-by-step explanation: I HOPE you FIND it helpful

9.

15) The first Republic Day of India was celebrated on 26th January, 1950. It was:a) Tuesdayb) WednesdayThursday d) Friday

Answer»

Answer:

C)THURSDAY

Step-by-step explanation:

I HOPE you FIND it helpful

Discussion

10.	Prove 3+5√2 is an irrational number
Answer» Answer: may this help you Step-by-step explanation: let 3+5√2 be RATIONAL and have only COMMON factor 1. but it is not possible . It is CONTRADICTION to our ASSUMPTION . so, 3+5√2 is a irrational.

10.

Prove 3+5√2 is an irrational number

Answer»

Answer:

may this help you

Step-by-step explanation:

let 3+5√2 be RATIONAL and have only COMMON factor 1. but it is not possible . It is CONTRADICTION to our ASSUMPTION . so, 3+5√2 is a irrational.

Discussion

11.	Find the complement of ths angle 46degree 30'
Answer» Step-by-step explanation: 180degree -40degree 30MINS

11.

Find the complement of ths angle 46degree 30'

Answer»

Step-by-step explanation:

180degree -40degree 30MINS

Discussion

12.	[(-2)+(-7)]×3=3×______+3×______
Answer» Answer: [(-2)+(-7)]×3 = 3×___+3×____ USING distributive PROPERTY [(-2)+(-7)]×3=3(-2)+3×(-7) (-9)×3=(-6)+(-21) (-27)=(-27)

12.

[(-2)+(-7)]×3=3×+3×

Answer»

Answer:

[(-2)+(-7)]×3 = 3×___+3×____

USING distributive PROPERTY

[(-2)+(-7)]×3=3(-2)+3×(-7)

(-9)×3=(-6)+(-21)

(-27)=(-27)

Discussion

13.	Find the HCf number by division method 18,24,36
Answer» 6 is the HCF of 18,24,36

13.

Find the HCf number by division method 18,24,36

Answer»

6 is the HCF of 18,24,36

Discussion

14.	Q.4 simplify:- (25)1/3× (5)1/3
Answer» ANSWER: (20)5/6 *follow* me *MARK* as *BRAINLIEST*

14.

Q.4 simplify:- (25)1/3× (5)1/3

Answer»

ANSWER:

(20)5/6

follow me

MARK as BRAINLIEST

Discussion

15.	Please answer this question mates .
Answer» Step-by-step EXPLANATION: PLEASE REFER the ATTACHMENT

15.

Please answer this question mates .

Answer»

Step-by-step EXPLANATION:

PLEASE REFER the ATTACHMENT

Discussion

16.	In an entrance test containing 50 questions 2 marks are given for every correct answer and -1 mark is given for a wrong answer. Kritika attempted all questions but only 35 are correct. What is her score?
Answer» Answer: 55 Step-by-step explanation: 35×2=70 70-15=55 ........

16.

In an entrance test containing 50 questions 2 marks are given for every correct answer and -1 mark is given for a wrong answer. Kritika attempted all questions but only 35 are correct. What is her score?

Answer»

Answer:

55

Step-by-step explanation:

35×2=70

70-15=55

........

Discussion

17.	Two persons, A and B are running on acircular track. At the start, B is ahead ofA and their positions make an angle of30° at the centre of the circle. When Areaches the point diametrically oppositeto his starting point, he meets B. Whatis the ratio of speeds of A and B, ifthey are running with uniform speeds?
Answer» Answer: Answer: The CORRECT OPTION is A. Explanation: Speed = Distance / Time Time travelled is same for both A and B. Distance travelled by A = πr Distance travelled by B = πr - πr/6 = 5πr/6 Required RATIO = 6 : 5 Step-by-step explanation: PLZ make it best

17.

Two persons, A and B are running on acircular track. At the start, B is ahead ofA and their positions make an angle of30° at the centre of the circle. When Areaches the point diametrically oppositeto his starting point, he meets B. Whatis the ratio of speeds of A and B, ifthey are running with uniform speeds?

Answer»

Answer:

Answer:

The CORRECT OPTION is A.

Explanation:

Speed = Distance / Time

Time travelled is same for both A and B.

Distance travelled by A = πr

Distance travelled by B = πr - πr/6 = 5πr/6

Required RATIO = 6 : 5

Step-by-step explanation:

PLZ make it best

Discussion

18.	Ans aane pe he provide karen plz
Answer» Step-by-step EXPLANATION: OPTION 2 is CORRECT plz LIKE and FOLLOW me plz

18.

Ans aane pe he provide karen plz

Answer»

Step-by-step EXPLANATION:

OPTION 2 is CORRECT plz LIKE and FOLLOW me plz

Discussion

19.	If √3= 1.732 then find the value of √2-√3/√2+√3 is
Answer» 1.04 (Approx) Step-by-step explanation: Given: √3 = 1.732 √2 = 1.414 (I know) To FIND: The value of $\dfrac{ \sqrt{2} - \sqrt{3} }{ \sqrt{2} + \sqrt{3} }$ Solution: 1st We just NEED to rationalize the denominator of question. 2nd Substituting the value of given, We will GET the answer. Sound so simple ^_^ $\frac{ \sqrt{2} - \sqrt{3} }{ \sqrt{2} + \sqrt{3} } \\ \\ \frac{( \sqrt{2} - \sqrt{3})( \sqrt{2} - \sqrt{3} ) }{( \sqrt{2} + \sqrt{3})( \sqrt{2} - \sqrt{3} ) } \\ \\ \frac{ {( \sqrt{2} - \sqrt{3} )}^{2} }{ { (\sqrt{2}) }^{2} - {( \sqrt{3} )}^{2} } \\ \\ \frac{ {( \sqrt{2}) }^{2} + {( \sqrt{3} )}^{2} - 2. \sqrt{2} . \sqrt{3} }{2 - 3} \\ \\ \frac{2 + 3 - 2 \sqrt{6} }{ - 1} \\ \\ \frac{5 - 2 \sqrt{6} }{ - 1} \\ \\ - (5 - 2 \sqrt{6} ) \\ \\ 2 \sqrt{2}. \sqrt{3} - 5$ [Substituting the given VALUES ] $2 \times 1.141 \times 1.732 - 5 \\ \\ 2 \times 1.976212 - 5 \\ \\ 2 \times 1.98 - 5 \\ \\ 3.96 - 5 \\ \\ 1.04 \: \: \: [\text{approx}]$ Therefore, the required answer is 1.04 approx.

19.

If √3= 1.732 then find the value of √2-√3/√2+√3 is

Answer»

1.04 (Approx)

Step-by-step explanation:

Given:

√3 = 1.732

√2 = 1.414 (I know)

To FIND:

The value of $\dfrac{ \sqrt{2} - \sqrt{3} }{ \sqrt{2} + \sqrt{3} }$

Solution:

1st We just NEED to rationalize the denominator of question.

2nd Substituting the value of given, We will GET the answer.

Sound so simple ^_^

$\frac{ \sqrt{2} - \sqrt{3} }{ \sqrt{2} + \sqrt{3} } \\ \\ \frac{( \sqrt{2} - \sqrt{3})( \sqrt{2} - \sqrt{3} ) }{( \sqrt{2} + \sqrt{3})( \sqrt{2} - \sqrt{3} ) } \\ \\ \frac{ {( \sqrt{2} - \sqrt{3} )}^{2} }{ { (\sqrt{2}) }^{2} - {( \sqrt{3} )}^{2} } \\ \\ \frac{ {( \sqrt{2}) }^{2} + {( \sqrt{3} )}^{2} - 2. \sqrt{2} . \sqrt{3} }{2 - 3} \\ \\ \frac{2 + 3 - 2 \sqrt{6} }{ - 1} \\ \\ \frac{5 - 2 \sqrt{6} }{ - 1} \\ \\ - (5 - 2 \sqrt{6} ) \\ \\ 2 \sqrt{2}. \sqrt{3} - 5$

[Substituting the given VALUES ]

$2 \times 1.141 \times 1.732 - 5 \\ \\ 2 \times 1.976212 - 5 \\ \\ 2 \times 1.98 - 5 \\ \\ 3.96 - 5 \\ \\ 1.04 \: \: \: [\text{approx}]$

Therefore, the required answer is 1.04 approx.

Discussion

20.	Can somebody explain me this
Answer» This answer determines to see WHETHER \__QPL is the same measure of the \__ RPL. Hope it HELPS u... Do MARK as BRAINLIST...

20.

Can somebody explain me this

Answer»

This answer determines to see WHETHER \__QPL is the same measure of the \__ RPL.

Hope it HELPS u...

Do MARK as BRAINLIST...

Discussion

21.	Find B A and use this equation to solve x-y=3 , 2x+3y+4z=17,y+2x=7Mtrix
Answer» x-y=3 , 2x+3y+4z=17,y+2x=7

21.

Find B A and use this equation to solve x-y=3 , 2x+3y+4z=17,y+2x=7Mtrix

Answer»

x-y=3 , 2x+3y+4z=17,y+2x=7

Discussion

22.	Q.3 If P(Y)= 4+3y-Y2+5y3, Find P(3)
Answer» <P>Step-by-step explanation: p(y)=4+3y-y²+5y³ =5y³-y²+3y+4 p(0)=5y³-y²+3y+4 =5(0)³-(0)²+30+4 =50-03+0+4 =0-0+0+4 =4 p(1)=5y³-y²+3y+4 =5(1)³-(1)²+31+4 =51-1+3+4 =5-1+7 =4+7 =11 p(2)=5y³-y²+3y+4 =5(2)³-(2)²+32+4 =58-4+6+4 =40-4+10 =36+10 =46 so, p(0)=4 , p(1)=11 , p(2)=46

22.

Q.3 If P(Y)= 4+3y-Y2+5y3, Find P(3)

Answer»

<P>Step-by-step explanation:

p(y)=4+3y-y²+5y³

=5y³-y²+3y+4

p(0)=5y³-y²+3y+4

=5*(0)³-(0)²+3*0+4

=5*0-0*3+0+4

=0-0+0+4

=4

p(1)=5y³-y²+3y+4

=5*(1)³-(1)²+3*1+4

=5*1-1+3+4

=5-1+7

=4+7

=11

p(2)=5y³-y²+3y+4

=5*(2)³-(2)²+3*2+4

=5*8-4+6+4

=40-4+10

=36+10

=46

so, p(0)=4 , p(1)=11 , p(2)=46

Discussion

23.	The abscissa of point is 4 find it ordinate if it distance from( 1,2) is 5 by distance formulapls help fast
Answer» ANSWER: Step-by-step explanation:4, 6 is the answer. PLEASE MARK me BRAINLIEST

23.

The abscissa of point is 4 find it ordinate if it distance from( 1,2) is 5 by distance formulapls help fast

Answer»

ANSWER:

Step-by-step explanation:4, 6 is the answer. PLEASE MARK me BRAINLIEST

Discussion

24.	Simplify the following expressions applying laws of exponents.
Answer» Answer: Ans (i) 7 to the POWER 1/3 × 7 to the power -1/2 = 7 to the power 1/3 + (-1/2) = 7 to the power -1/6 (Ans) Ans (ii) (1 + 8 + 27) to the power 1/2 = 36 to the power 1/2 = (6)² to the power 1/2 1/2 and 2 GET cancelled. = 6 (Ans) IF YOU LIKE THIS ANSWER PLEASE MARK AS BRAINLIEST.

24.

Simplify the following expressions applying laws of exponents.

Answer»

Answer:

Ans (i) 7 to the POWER 1/3 × 7 to the power -1/2

= 7 to the power 1/3 + (-1/2) = 7 to the power -1/6 (Ans)

Ans (ii) (1 + 8 + 27) to the power 1/2

= 36 to the power 1/2

= (6)² to the power 1/2

*1/2 and 2 GET cancelled.*

= 6 (Ans)

IF YOU LIKE THIS ANSWER PLEASE MARK AS BRAINLIEST.

Discussion

25.	Solve the equation 5x+7/2=3/2x-14
Answer» ANSWER: Answer: x = -5 Explanation: Given simple EQUATION : 5x + 7/2 = 3x/2 - 14 Subtract 7/2 both sides of the equation, we GET => 5x+7/2-7/2 = 3x/2-14-7/2 => 5x - 3x/2 = -14 - 7/2 => (10x-3x)/2 = (-28-7)/2 => 7x/2 = -35/2 => x = (-35/2) × (2/7) => x = (-35 × 2)/(2×7) After cancellation, we get => x = -5 Therefore, x = -5 Step-by-step explanation: plz make it best

25.

Solve the equation 5x+7/2=3/2x-14

Answer»

ANSWER:

Answer:

x = -5

Explanation:

Given simple EQUATION :

5x + 7/2 = 3x/2 - 14

Subtract 7/2 both sides of the

equation, we GET

=> 5x+7/2-7/2 = 3x/2-14-7/2

=> 5x - 3x/2 = -14 - 7/2

=> (10x-3x)/2 = (-28-7)/2

=> 7x/2 = -35/2

=> x = (-35/2) × (2/7)

=> x = (-35 × 2)/(2×7)

After cancellation, we get

=> x = -5

Therefore,

x = -5

Step-by-step explanation:

plz make it best

Discussion

26.	-1/2,-1/2,-1/2,-1/2,.....
Answer» Step-by-step EXPLANATION: I don't UNDERSTAND this QUESTION OK FRIEND

26.

-1/2,-1/2,-1/2,-1/2,.....

Answer»

Step-by-step EXPLANATION:

I don't UNDERSTAND this QUESTION OK FRIEND

Discussion

27.	Simplify : 1/4×2 1/3-1 1/4×1/5 please answer
Answer» ANSWER: Solution: 3 1/3 ÷ 5/3 - 1/10 of 2 ½ + 7/4 = (3 × 3 + 1)/3 ÷ 5/3 – 1/10 of (2 × 2 + 1)/2 + 7/4 = 10/3 ÷ 5/3 - 1/10 of 5/2 + 7/4 [‘of’ simplified] = 10/3 × 3/5 – ½ × ½ + 7/4 [‘÷’ simplified] = 2/1 - ¼ + 7/4 [‘×’ simplified] = (2 × 4)/1 × 4) - (1 × 1)/4 × 1) + (7 × 1)/4 × 1) = 8/4 - ¼ + 7/4 [Now the denominators are same of all the FRACTIONS] = (8 – 1 + 7)/4 [‘+’ and ‘-‘ simplified] = 14/4 = 7/2 HOPE IT HELPS YOU!!! ***

27.

Simplify : 1/4×2 1/3-1 1/4×1/5 please answer

Answer»

ANSWER:

Solution:

3 1/3 ÷ 5/3 - 1/10 of 2 ½ + 7/4

= (3 × 3 + 1)/3 ÷ 5/3 – 1/10 of (2 × 2 + 1)/2 + 7/4

= 10/3 ÷ 5/3 - 1/10 of 5/2 + 7/4

[‘of’ simplified]

= 10/3 × 3/5 – ½ × ½ + 7/4 [‘÷’ simplified]

= 2/1 - ¼ + 7/4 [‘×’ simplified]

= (2 × 4)/1 × 4) - (1 × 1)/4 × 1) + (7 × 1)/4 × 1)

= 8/4 - ¼ + 7/4

[Now the denominators are same of all the FRACTIONS]

= (8 – 1 + 7)/4 [‘+’ and ‘-‘ simplified]

= 14/4

= 7/2

HOPE IT HELPS YOU!!! ***

Discussion

28.	Find the missingcoordinates of a right triangle whose sides are A (2,3) B (5,7)and
Answer» Answer: SEE the attachment for answer Step-by-step explanation: HEY frnd I think some information is .missing I not GET the answer but I tired my BEST to answer. If you want you. can delete it. if you like then plzz mark as BRAINLIST...

28.

Find the missingcoordinates of a right triangle whose sides are A (2,3) B (5,7)and

Answer»

Answer:

SEE the attachment for answer

Step-by-step explanation:

HEY frnd I think some information is .missing I not GET the answer but I tired my BEST to answer.

If you want you. can delete it.

if you like then plzz mark as BRAINLIST...

Discussion

29.	A={x:x€N x is a composite number and 6
Answer» ANSWER: LONG EXPLANATION so SORRY for not ANSWERING

29.

A={x:x€N x is a composite number and 6

Answer»

ANSWER:

LONG EXPLANATION so SORRY for not ANSWERING

Discussion

30.	Three+children+are+walking.+Their+steps+measure+36+cm,72cm+and+90+cm.+If+they+step+from+a+line+AB,+their+steps+will+fall+together+again+at+a+line+CD.+What+is+the+distance+between+AB+and+CD?
Answer» why you USE the ADDITION SIGN between EVERY WORD

Discussion

31.	-4*2+x=8 solve this equation
Answer» ANSWER: x=16 Step-by-step EXPLANATION: -8+x=8 x=8+8 x=16 Ans hope it helps plz MARK me as BRAINLIST

31.

-4*2+x=8 solve this equation

Answer»

ANSWER:

x=16

Step-by-step EXPLANATION:

-8+x=8

x=8+8

x=16 Ans

hope it helps

plz MARK

me as BRAINLIST

Discussion

32.	The difference between age of two brothers is 3 years five years ago the younger was 2/5 times the age of elder brother and their present age
Answer» $\sf\large\underline{Let:}$ $\rm{The\: present\: age\:of\:elder\: brother=x\: year's}$ $\rm{The\: present\:age\:of\: younger\: brother=y\:year's}$ $\sf\large\underline{To\: Find:}$ $\rm{The\: present\:age\:two\: brother's}$ $\sf\large\underline{Solution:}$ $\sf\large\underline{Given:in\:1st\:case:}$ $\rm{The\: difference\: between\:age\:two\: brothers=3}$ $\rm{\implies x-y=3}$ $\rm\green{\implies x-y=3------(i)}$ $\rm{\implies x=3+y}$ $\sf\large\underline{Given:in\:2nd\:case:}$ $\rm{Five\: years\:ago\: younger\:was\:2/5\: times\:the\:age\:of\: elder\: brother}$ $\rm{\implies y-5=\dfrac{2}{5}(x-5)}$ $\rm{\implies 2x-10=5y-25}$ $\rm{\implies 2x-5y=-25+10}$ $\rm\red{\implies 2x-5y=-15------(<klux>II</klux>)}$ [Putting the VALUE of X=3+y in EQ ii] $\rm{\implies 2x-5y=-15}$ $\rm{\implies 2(3+y)-5y=-15}$ $\rm{\implies 6+2y-5y=-15}$ $\rm{\implies -3y=-15-6}$ $\rm{\implies -3y=-21}$ $\rm\red{\implies y=7}$ [putting the value of y=7 in i] $\rm{\implies x-y=3}$ $\rm{\implies x-7=3}$ $\rm{\implies x=3+7}$ $\rm\red{\implies x=10}$ Hence, $\rm{\implies The\: present\:age\:of\: elder\: brother=10\: year's}$ $\rm{\implies The\: present\:age\:of\: younger\: brother=7\: year's}$

32.

The difference between age of two brothers is 3 years five years ago the younger was 2/5 times the age of elder brother and their present age

Answer»

$\sf\large\underline{Let:}$

$\rm{The\: present\: age\:of\:elder\: brother=x\: year's}$

$\rm{The\: present\:age\:of\: younger\: brother=y\:year's}$

$\sf\large\underline{To\: Find:}$

$\rm{The\: present\:age\:two\: brother's}$

$\sf\large\underline{Solution:}$

$\sf\large\underline{Given:in\:1st\:case:}$

$\rm{The\: difference\: between\:age\:two\: brothers=3}$

$\rm{\implies x-y=3}$

$\rm\green{\implies x-y=3------(i)}$

$\rm{\implies x=3+y}$

$\sf\large\underline{Given:in\:2nd\:case:}$

$\rm{Five\: years\:ago\: younger\:was\:2/5\: times\:the\:age\:of\: elder\: brother}$

$\rm{\implies y-5=\dfrac{2}{5}(x-5)}$

$\rm{\implies 2x-10=5y-25}$

$\rm{\implies 2x-5y=-25+10}$

$\rm\red{\implies 2x-5y=-15------(<klux>II</klux>)}$

[Putting the VALUE of X=3+y in EQ ii]

$\rm{\implies 2x-5y=-15}$

$\rm{\implies 2(3+y)-5y=-15}$

$\rm{\implies 6+2y-5y=-15}$

$\rm{\implies -3y=-15-6}$

$\rm{\implies -3y=-21}$

$\rm\red{\implies y=7}$

[putting the value of y=7 in i]

$\rm{\implies x-y=3}$

$\rm{\implies x-7=3}$

$\rm{\implies x=3+7}$

$\rm\red{\implies x=10}$

Hence,

$\rm{\implies The\: present\:age\:of\: elder\: brother=10\: year's}$

$\rm{\implies The\: present\:age\:of\: younger\: brother=7\: year's}$

Discussion

33.	If the angles of a triangle are in the ratio 3:4:5, find the angles.
Answer» Answer: Step-by-step EXPLANATION: sum of all angles = 180 3x + 4X+ 5X = 12x 180/12x .... therefore...... x=15 3x:4x:5x = 45:60:75 MARK BRAINLIEST IF YOU FIND THE ANSWER AS CORRECT

33.

If the angles of a triangle are in the ratio 3:4:5, find the angles.

Answer»

Answer:

Step-by-step EXPLANATION:

sum of all angles = 180

3x + 4X+ 5X = 12x

180/12x ....

therefore......

x=15

3x:4x:5x = 45:60:75

MARK BRAINLIEST IF YOU FIND THE ANSWER AS CORRECT

Discussion

34.	Classify the following numbers as a rational irrational 30.232342345...
Answer» ANSWER: IRRATIONAL because it's decimal expansion is NON terminating non recurring

34.

Classify the following numbers as a rational irrational 30.232342345...

Answer»

ANSWER:

IRRATIONAL

because it's decimal expansion is NON terminating non recurring

Discussion

35.	Product of all the zeroes of the cubic polynomial 3xcube -5x square +8x -12is ?
Answer» Step-by-step EXPLANATION: alphaBETAgama = -d/a = -(-12)/3 =4

35.

Product of all the zeroes of the cubic polynomial 3xcube -5x square +8x -12is ?

Answer»

Step-by-step EXPLANATION:

alpha*BETA*gama = -d/a

= -(-12)/3

=4

Discussion

36.	The difference of the complex numbers (6 + 5i), (3 +2i)
Answer» Answer: 3 + 3I Step-by-step explanation: (6 + 5I ) - ( 3 + 2i) (6 - 3 + 5i - 2i) 3 + 3i

36.

The difference of the complex numbers (6 + 5i), (3 +2i)

Answer»

Answer:

3 + 3I

Step-by-step explanation:

(6 + 5I ) - ( 3 + 2i)

(6 - 3 + 5i - 2i)

3 + 3i

Discussion

37.	How many places are there in thousands period
Answer» ❤AnSwEr❤ ⏩three PLACES.... ⏩The ones PERIOD CONSISTS of the digits in the hundreds, tens, and ones places. The THOUSANDS period consists of the three places to the left of the ones period. The MILLIONS period consists of the three places to the left of the thousands period.... @doll54 ✌☺

37.

How many places are there in thousands period

Answer»

❤AnSwEr❤

⏩three PLACES....

⏩The ones PERIOD CONSISTS of the digits in the hundreds, tens, and ones places. The THOUSANDS period consists of the three places to the left of the ones period. The MILLIONS period consists of the three places to the left of the thousands period....

@doll54 ✌☺

Discussion

38.	Please let me know the answer with explanation.
Answer» ANSWER: option B) is the CORRECT answer according to the QUESTION

38.

Please let me know the answer with explanation.

Answer»

ANSWER:

option B) is the CORRECT answer according to the QUESTION

Discussion

39.	Which of the following are examples of exponential decay?
Answer» Answer: I HOPE it will be help to you PLEASE mark as BRANLIEST and like me

39.

Which of the following are examples of exponential decay?

Answer»

Answer:

I HOPE it will be help to you PLEASE mark as BRANLIEST and like me

Discussion

40.	Explain the topic algebraic expressions
Answer» Answer: A combination of constants and variables connected by the sign of fundamental operations of addition, substraction, MULTIPLICATION and division is called an ALGEBRAIC expression. example:- x + 3 , 2y - 6 , 4XY + 7 ETC.

40.

Explain the topic algebraic expressions

Answer»

Answer:

A combination of constants and variables connected by the sign of fundamental operations of addition, substraction, MULTIPLICATION and division is called an ALGEBRAIC expression.

example:- x + 3 , 2y - 6 , 4XY + 7 ETC.

Discussion

41.	The Product of two rational number is 5/8.If one of them is -3/18,find the other
Answer» Given $\bold{Product \ of \ 2 \ <klux>RATIONAL</klux> \ numbers} = \dfrac{5}{8}$ $\bold{One \ of \ the \ rational \ <klux>NUMBER</klux>} = \dfrac{-3}{18}$ Let the other rational number be X. $\implies \dfrac{-3}{18} x = \dfrac{5}{8}$ $\implies x = \dfrac{5}{8} * \dfrac{18}{-3}$ $\implies x = \dfrac{5}{4} * \dfrac{9}{-3}$ $\implies x = \dfrac{45}{-12}$ $\implies x = \dfrac{-15}{4}$ $\boxed{\boxed{\bold{Therefore, \ the \ other \ number \ is \ \frac{15}{4}}}}}}$

41.

The Product of two rational number is 5/8.If one of them is -3/18,find the other

Answer»

Given

$\bold{Product \ of \ 2 \ <klux>RATIONAL</klux> \ numbers} = \dfrac{5}{8}$

$\bold{One \ of \ the \ rational \ <klux>NUMBER</klux>} = \dfrac{-3}{18}$

Let the other rational number be X.

$\implies \dfrac{-3}{18} x = \dfrac{5}{8}$

$\implies x = \dfrac{5}{8} * \dfrac{18}{-3}$

$\implies x = \dfrac{5}{4} * \dfrac{9}{-3}$

$\implies x = \dfrac{45}{-12}$

$\implies x = \dfrac{-15}{4}$

$\boxed{\boxed{\bold{Therefore, \ the \ other \ number \ is \ \frac{15}{4}}}}}}$

Discussion

42.	Give 10 rules of vedic mathematics
Answer» ❤AnSwEr❤ ⏩There are 8 Vedic Maths Tricks ➡Squaring Of A Number Whose UNIT Digit Is 5. ... ➡Multiply a Number By 5. ... ➡Subtraction From 1000, 10000, 100000. ... ➡Multiplication Of Any 2-digit Numbers (11 - 19) ... ➡Dividing A Large Number By 5. ... ➡Multiply Any Two-digit Number By 11. ... ➡Multiplication Of Any 3-digit Numbers. ... ➡Find The SQUARE Value. @doll54 ☺✌

42.

Give 10 rules of vedic mathematics

Answer»

❤AnSwEr❤

⏩There are 8 Vedic Maths Tricks

➡Squaring Of A Number Whose UNIT Digit Is 5. ...

➡Multiply a Number By 5. ...

➡Subtraction From 1000, 10000, 100000. ...

➡Multiplication Of Any 2-digit Numbers (11 - 19) ...

➡Dividing A Large Number By 5. ...

➡Multiply Any Two-digit Number By 11. ...

➡Multiplication Of Any 3-digit Numbers. ...

➡Find The SQUARE Value.

@doll54 ☺✌

Discussion

43.	If two angles of a triangle are 60 then the triangle is?
Answer» Answer ISOSCELES Triangle Step-by-step explanation: The BASE angles a equal, so also the SIDES with the base angles. Therefore it is an Isosceles Triangle.

43.

If two angles of a triangle are 60 then the triangle is?

Answer»

Answer

ISOSCELES Triangle

Step-by-step explanation:

The BASE angles a equal, so also the SIDES with the base angles.

Therefore it is an Isosceles Triangle.

Discussion

44.	16-4+12×3÷5=? what is value of following expression?
Answer» Answer: 19.2 Step-by-step explanation: To add or SUBTRACT two or more fractions, proceed as under: (i) Convert the mixed fractions (if any.) or natural numbers to IMPROPER fraction. (II) Find the L.C.M of the denominators of the fractions and place the L.C.M below a horizontal bar. (III) The L.C.M is then divided by each denominator and the quotient is multiplied to the corresponding numerator. The results obtained are placed above the horizontal bar with proper sign (+) or (-) to obtain a single fraction. (iv) Reduce the fraction obtained to simplest form and then convert it into mixed form if needed.

44.

16-4+12×3÷5=? what is value of following expression?

Answer»

Answer:

19.2

Step-by-step explanation:

To add or SUBTRACT two or more fractions, proceed as under:

(i) Convert the mixed fractions (if any.) or natural numbers to IMPROPER fraction.

(II) Find the L.C.M of the denominators of the fractions and place the L.C.M below a horizontal bar.

(III) The L.C.M is then divided by each denominator and the quotient is multiplied to the corresponding numerator. The results obtained are placed above the horizontal bar with proper sign (+) or (-) to obtain a single fraction.

(iv) Reduce the fraction obtained to simplest form and then convert it into mixed form if needed.

Discussion

45.	After reaching the water level, the frog jumps 4 steps up and then 2 steps down in every move .In how many jumps will it return to the topmost step
Answer» Answer: The given information is not sufficient. you MUST GIVE the NUMBER of steps present. Step-by-step EXPLANATION: *PLEASE SELECT MY ANSWER AS THE BRAINLIEST ANSWER.*

45.

After reaching the water level, the frog jumps 4 steps up and then 2 steps down in every move .In how many jumps will it return to the topmost step

Answer»

Answer:

The given information is not sufficient. you MUST GIVE the NUMBER of steps present.

Step-by-step EXPLANATION:

PLEASE SELECT MY ANSWER AS THE BRAINLIEST ANSWER.

Discussion

46.	Aij =i-j if i>=j i+j if i
Answer» Answer: type QUESTION CLEARLY i can't UNDERSTAND this question.....

46.

Aij =i-j if i>=j i+j if i

Answer»

Answer:

type QUESTION CLEARLY

i can't UNDERSTAND this question.....

Discussion

47.	10 Solve The Pairs Of Linear Equation By Elimination Method:-3x + 4y=5,. 2x-3y=4.
Answer» Answer: 3x + 4y = 5 MULTIPLY BY 2 2x + 3Y = 4 MULTIPLY BY -3 & ADD 6X+8Y=10 -6X-9Y=-12 -------------------- -Y=-2 Y=2 ans. 3X+42=5 3X+8=5 3X=5-8 3X=-3 X=-3/3 X=-1 ans. Proof: 2-1+32=4 -2+6=4 4=4 Step-by-step EXPLANATION:* PLZ make it best

47.

10 Solve The Pairs Of Linear Equation By Elimination Method:-3x + 4y=5,. 2x-3y=4.

Answer»

Answer:

3x + 4y = 5 MULTIPLY BY 2

2x + 3Y = 4 MULTIPLY BY -3 & ADD

6X+8Y=10

-6X-9Y=-12

--------------------

-Y=-2

Y=2 ans.

3X+4*2=5

3X+8=5

3X=5-8

3X=-3

X=-3/3

X=-1 ans.

Proof:

2*-1+3*2=4

-2+6=4

4=4

Step-by-step EXPLANATION:

PLZ make it best

Discussion

48.	Q2 The persistence of sound in a big hall due to repretanreflections is called as:as Impulsec) Reverberationb) Echo - Rangingdy Wacord
Answer» ANSWER: C. REVERBERATION is the CORRECT answer

48.

Q2 The persistence of sound in a big hall due to repretanreflections is called as:as Impulsec) Reverberationb) Echo - Rangingdy Wacord

Answer»

ANSWER:

C. REVERBERATION is the CORRECT answer

Discussion

49.	??can u solve this guys
Answer» Answer: x = 30° Step-by-step explanation: Given, PQ ║ RS ∠PAC = ∠ACS (alternate INTERIOR ANGLES of transversal is equal) 70 + x = 100 x = 100 - 70 x = 30°// WE CAN SOLVE THIS IN MORE WAYS BUT THIS IS THE SHORTEST METHOD Please MARK as brainliest

49.

??can u solve this guys

Answer»

Answer:

x = 30°

Step-by-step explanation:

Given, PQ ║ RS

∠PAC = ∠ACS (alternate INTERIOR ANGLES of transversal is equal)

70 + x = 100

x = 100 - 70

x = 30°//

WE CAN SOLVE THIS IN MORE WAYS BUT THIS IS THE SHORTEST METHOD

Please MARK as brainliest

Discussion

50.	Two concentric circles of radii 5 cm and 3 cm are drawn. Find the length of the chord of the larger circle which touches the smaller circle.
Answer» ANSWER: $\text{[math]}$ SEE attachment Explanation: FOLLOW me ♥️

50.

Two concentric circles of radii 5 cm and 3 cm are drawn. Find the length of the chord of the larger circle which touches the smaller circle.

Answer»

ANSWER:

$\text{[math]}$ SEE attachment

Explanation:

FOLLOW me ♥️

Discussion

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❤AnSwEr❤

⏩three PLACES....

⏩The ones PERIOD CONSISTS of the digits in the hundreds, tens, and ones places. The THOUSANDS period consists of the three places to the left of the ones period. The MILLIONS period consists of the three places to the left of the thousands period....

@doll54 ✌☺

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❤AnSwEr❤

⏩There are 8 Vedic Maths Tricks

➡Squaring Of A Number Whose UNIT Digit Is 5. ...

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➡Subtraction From 1000, 10000, 100000. ...

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➡Dividing A Large Number By 5. ...

➡Multiply Any Two-digit Number By 11. ...

➡Multiplication Of Any 3-digit Numbers. ...

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@doll54 ☺✌

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??can u solve this guys

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