332354 + Interview Questions in Secondary School in Math

1.	If f(x)=xsquare-5x+1, then the value of f(2)+f(-1) is
Answer» f(x)=x^2-5x+1 f(2)=(2)^2-5(2)+1 f(2)=4-10+1 f(2)=-6+1 f(2)=-5 f(-1)=(-1)^2-5(-1)+1 f(-1)=1+5+1 f(-1)=7 f(2)+f(-1)=-5+7=2 I HOPE it's help you Plz mark my answer as a BRAINLIEST answer

1.

If f(x)=xsquare-5x+1, then the value of f(2)+f(-1) is

Answer»

f(x)=x^2-5x+1

f(2)=(2)^2-5(2)+1

f(2)=4-10+1

f(2)=-6+1

f(2)=-5

f(-1)=(-1)^2-5(-1)+1

f(-1)=1+5+1

f(-1)=7

f(2)+f(-1)=-5+7=2

I HOPE it's help you

Plz mark my answer as a BRAINLIEST answer

Discussion

2.	Determine the unknown value in each equationQ= 7+9d=7d +3
Answer» ANSWER: d = -2 Step-by-step explanation: 7 + 9D = 7d + 3 4 + 9d = 7d 4 = -2d d= 4/(-2) So, d = (-2)

2.

Determine the unknown value in each equationQ= 7+9d=7d +3

Answer»

ANSWER:

d = -2

Step-by-step explanation:

7 + 9D = 7d + 3

4 + 9d = 7d

4 = -2d

d= 4/(-2)

So, d = (-2)

Discussion

3.	8x+5y=9 3x +2y=4 multipulcation method
Answer» ANSWER: X= -2 and y= 5 Hope it'll HELP you.

3.

8x+5y=9 3x +2y=4 multipulcation method

Answer»

ANSWER:

X= -2 and y= 5

Hope it'll HELP you.

Discussion

4.	(a+2b) x+(2a-b)y=2&(a-2b)x+(2a+b)y=3solve using subsitutionmethod
Answer» Step-by-step EXPLANATION: WY EJ. RK. q4mrn5iwm4umq4umq414q

4.

(a+2b) x+(2a-b)y=2&(a-2b)x+(2a+b)y=3solve using subsitutionmethod

Answer»

Step-by-step EXPLANATION:

WY EJ. RK. q4mrn5iwm4umq4umq414q

Discussion

5.	If the cube of 1 +3/5 is 4 +x/125, find the value of x.
Answer» ANSWER: the answer for your QUESTION is 508 MARK me as a BRILLIANT

5.

If the cube of 1 +3/5 is 4 +x/125, find the value of x.

Answer»

ANSWER:

the answer for your QUESTION is 508

MARK me as a BRILLIANT

Discussion

6.	Why we do cube at both sides
Answer» ANSWER: heyyy, the QUESTION is not clear Step-by-step EXPLANATION: PLZ MARK ME AS A BRAINLIEST FOLLOW ME I HOPE THIS IS HELPFUL FOR YOU AND OTHERS

6.

Why we do cube at both sides

Answer»

ANSWER:

heyyy,

the QUESTION is not clear

Step-by-step EXPLANATION:

PLZ MARK ME AS A BRAINLIEST

FOLLOW ME

I HOPE THIS IS HELPFUL FOR YOU AND OTHERS

Discussion

7.	अनुपूरक कोण का मान कितना होता है
Answer» ANSWER: Dhwjnevxdn Hbgddahjk vhhjjffhkovx

7.

अनुपूरक कोण का मान कितना होता है

Answer»

ANSWER:

Dhwjnevxdn Hbgddahjk vhhjjffhkovx

Discussion

8.	Using the given points, determine Δy. (-3, -5) and (0, 10) Δy = 3 Δy = 5 Δy = 13 Δy = 15
Answer» ANSWER: I don't KNOW the answer of this QUESTION

8.

Using the given points, determine Δy. (-3, -5) and (0, 10) Δy = 3 Δy = 5 Δy = 13 Δy = 15

Answer»

ANSWER:

I don't KNOW the answer of this QUESTION

Discussion

9.	If alpha and beta are the zeros of the polynomial f(x)=ax2+bx+c then evaluat 1/alpha-1/beta
Answer» ANSWER: MARK me as a brilliant and ALSO FOLLOW me on

9.

If alpha and beta are the zeros of the polynomial f(x)=ax2+bx+c then evaluat 1/alpha-1/beta

Answer»

ANSWER:

MARK me as a brilliant

and ALSO FOLLOW me on

Discussion

10.	In what ratio does the points p(2,-5) divide the line segment joiningA(-3,5)&B(4,-9)
Answer» Answer: 5:2 Step-by-step EXPLANATION: USE SECTION FORMULA CORRECTLY

10.

In what ratio does the points p(2,-5) divide the line segment joiningA(-3,5)&B(4,-9)

Answer»

Answer:

5:2

Step-by-step EXPLANATION:

USE SECTION FORMULA CORRECTLY

Discussion

11.	In an ap, a= 3.5 d=0 and n=101 then an would be?
Answer» Answer: 3.5 Step-by-step EXPLANATION: an = a +(n-1)d = 3.5 + (101-1) 0 = 3.5

11.

In an ap, a= 3.5 d=0 and n=101 then an would be?

Answer»

Answer:

3.5

Step-by-step EXPLANATION:

an = a +(n-1)d

= 3.5 + (101-1) 0

= 3.5

Discussion

12.	Solve the equations32/x-y + 36/x+y. = 740/x-y. + 48/x+y. =9Can anybody? plzz..
Answer» ANSWER: Hii mate steps of construction: 32/x-y+36/X+y=7 40/x-y+48/X+y=9 let 1/x-y=a,1/X+y=b then 32a+36b=7...eq1 40a+48b=9...eq2 40xeq1 and. 32xeq2 1280a+1440b=280 1280a+1536b=288 Subtract EQ:1-2 1280a+1440b=280 1280a+1536b=288 - - - ________________ -96b=-8 b=-8/-96 b=1/12 __________________ sub b. in eq1 32a+36b=7 32a+36(1/12)=7 32a+3=7 32a=7-3 32a=4 a=4/32 a=1/8 then we know that a=1/x-y,b=1/X+y 1/8=1/x-y 1/12=1/X+y 8=x-y EQ(3) 12=X+y EQ(4) then ADD eq1&2 x-y=8 x+y=12 + +. + _______ 2x. =20 X=10 and b=2 mark me as a brilliant mate I had helped u a lot so please click me as a brilliant .

12.

Solve the equations32/x-y + 36/x+y. = 740/x-y. + 48/x+y. =9Can anybody? plzz..

Answer»

ANSWER:

Hii mate

steps of construction:

32/x-y+36/X+y=7

40/x-y+48/X+y=9

let 1/x-y=a,1/X+y=b

then

32a+36b=7...eq1

40a+48b=9...eq2

40xeq1 and. 32xeq2

1280a+1440b=280

1280a+1536b=288

Subtract EQ:1-2

1280a+1440b=280

1280a+1536b=288

- - -

________________

-96b=-8

b=-8/-96

b=1/12

__________________

sub b. in eq1

32a+36b=7

32a+36(1/12)=7

32a+3=7

32a=7-3

32a=4

a=4/32

a=1/8

then we know that a=1/x-y,b=1/X+y

1/8=1/x-y 1/12=1/X+y

8=x-y EQ(3) 12=X+y EQ(4)

then ADD eq1&2

x-y=8

x+y=12

+ +. +

_______

2x. =20

X=10

and b=2

mark me as a brilliant

mate I had helped u a lot so please click me as a brilliant

.

Discussion

13.	What is the statistical connection between IQ and weight of 15 years old girl
Answer» ANSWER: STATISTICS. Across STUDIES, the correlation coefficient of height and intelligence was generally found to be AROUND 0.2, indicating a positive association between height and intelligence which is weak but STILL statistically significant. Step-by-step explanation:

13.

What is the statistical connection between IQ and weight of 15 years old girl

Answer»

ANSWER: STATISTICS. Across STUDIES, the correlation coefficient of height and intelligence was generally found to be AROUND 0.2, indicating a positive association between height and intelligence which is weak but STILL statistically significant.

Step-by-step explanation:

Discussion

14.	State and prove thale's theorm
Answer» Step-by-step explanation: Given, A triangle ABC in which DE// BC and DE intersects AB and AC at D and E respectively. To prove , AD/DB = AE/EC. construction, Join BE and CD . DRAW EL perpendicular AB and DM perpendicular AC . proof, we have, ar ( ADE) = 1/2 × AD × EL and , ar( DBE ) 1/2 × DB × EL therefore, ar( ADE) / ar ( DBE) = 1/2 × AD × EL / 1/2 × DB × EL = AD/DB . --------- 1 similarly, ar(ADE) / ar( ECD) = 1/2 × AE × DM / 1/2 × EC × DM = AE/EC . -------- 2 Now, triangle DBE and triangle ECD being on the same base DE and between the parallels DE and BC , we have ar( DBE) = ar( ECD ) --------- 3 from 1 ,2 and 3 , we have, AD / DB = AE / EC . I have not drawn the drawing but you can easily do it from the solution given....

14.

State and prove thale's theorm

Answer»

Step-by-step explanation:

Given,

A triangle ABC in which DE// BC and DE intersects AB and AC at D and E respectively.

To prove ,

AD/DB = AE/EC.

construction,

Join BE and CD .

DRAW EL perpendicular AB and DM perpendicular AC .

proof,

we have,

ar ( ADE) = 1/2 × AD × EL

and , ar( DBE ) 1/2 × DB × EL

therefore, ar( ADE) / ar ( DBE) = 1/2 × AD × EL / 1/2 × DB × EL = AD/DB . --------- 1

similarly,

ar(ADE) / ar( ECD) = 1/2 × AE × DM / 1/2 × EC × DM = AE/EC . -------- 2

Now,

triangle DBE and triangle ECD being on the same base DE and between the parallels DE and BC , we have

ar( DBE) = ar( ECD ) --------- 3

from 1 ,2 and 3 , we have, AD / DB = AE / EC .

I have not drawn the drawing but you can easily do it from the solution given....

Discussion

15.	बुधवारी अपने बगीचे में चार पांच पौधे एक पंक्ति में लगाती है प्रत्येक पौधे की दूरी 3 बटा 4 मीटर है तो फिर प्रत्येक 1 पौधे के बीच की दूरी कितनी होगी बुधवारी अपने बगीचे में 5 पौधे एक पंक्ति में लगाती है प्रत्येक की दूरी 3 बटा 4 मीटर है तो फिर प्रत्येक पौधे में से एक पहली और अंतिम पौधे के बीच की दूरी कितनी होगी
Answer» ANSWER: अगर हरेक पौघे की दूरी 3 बता 4 है तो पहली और अंतिम पौधे की बीच की दूरी 3/4*4=3 मीटर होगी

15.

बुधवारी अपने बगीचे में चार पांच पौधे एक पंक्ति में लगाती है प्रत्येक पौधे की दूरी 3 बटा 4 मीटर है तो फिर प्रत्येक 1 पौधे के बीच की दूरी कितनी होगी बुधवारी अपने बगीचे में 5 पौधे एक पंक्ति में लगाती है प्रत्येक की दूरी 3 बटा 4 मीटर है तो फिर प्रत्येक पौधे में से एक पहली और अंतिम पौधे के बीच की दूरी कितनी होगी

Answer»

ANSWER:

अगर हरेक पौघे की दूरी 3 बता 4 है तो पहली और अंतिम पौधे की बीच की दूरी 3/4*4=3 मीटर होगी

Discussion

16.	Naren bought 7.4 kg of mangoes an the way home he gave 4.650 kg of mangoes to his sister family. Find the remaining mangoes
Answer» 7.4kg-4.650= 2.75 KG No.of REMAINED MANGOES =2.76kg

16.

Naren bought 7.4 kg of mangoes an the way home he gave 4.650 kg of mangoes to his sister family. Find the remaining mangoes

Answer»

7.4kg-4.650= 2.75

KG

No.of REMAINED MANGOES =2.76kg

Discussion

17.	write the quotient when the difference of 3 digit number 843 and the number obtained by reversing the digits is divided by 99
Answer» ANSWER: I don't know Step-by-step EXPLANATION: PLEASE ENJOY don't STUDY

17.

write the quotient when the difference of 3 digit number 843 and the number obtained by reversing the digits is divided by 99

Answer»

ANSWER:

I don't know

Step-by-step EXPLANATION:

PLEASE ENJOY don't STUDY

Discussion

18.	Evaluating 4489 by long division method
Answer» Step-by-step EXPLANATION: PLEASE MARK as BRAINLIEST

18.

Evaluating 4489 by long division method

Answer»

Step-by-step EXPLANATION:

PLEASE MARK as BRAINLIEST

Discussion

19.	5. A number consists of three digits, the right-hand digit being zero. If the left hand and the middle digitbe interchanged the number is diminished by 180. If the left-hand digit be halved and the middle andright-hand digits be interchanged the number is diminished by 454. Find the number,
Answer» Step-by-step explanation: SINCE the number contains three digits, it has a hundreds place, a tens place and a ones place. It is GIVEN that the right most digit is 0. Let the digits in the hundreds place and tens place be X and y respectively. Thus, the number is 100x+10y+0=100x+10y. It is also given that if the digits in the hundreds place and tens place are interchanged, the difference between the original number and the new number after interchange is 180. =>100x+10y−(100y+10x)=180 =>100x+10y−100y−10x=180 =>90x−90y=180 =>90(x−y)=180 =>x−y=2 ......(i) It is also given that if the digit in the hundreds place is halved and digits in tens place and ones place are interchanged, the difference between the original number and the new number after interchange is 180. =>100x+10y−(100x/2+0+y)=454 =>100x+10y−50x−y=454 =>50x+9y=464 .....(ii) MULTIPLYING both sides of Eqn (i) by 50, we get 50x−50y=100 Eqn(i)−Eqn(ii)=>(50x−50y)−(50x+9y)=100−454 =>50x−50y−50x−9y=−354 =>−59y=−354 =>y=6 Now, substitute the value of y in the equation x−y=2. =>x−6=2 =>x=8 Therefore, the three digit number xy0=860.

19.

5. A number consists of three digits, the right-hand digit being zero. If the left hand and the middle digitbe interchanged the number is diminished by 180. If the left-hand digit be halved and the middle andright-hand digits be interchanged the number is diminished by 454. Find the number,

Answer»

Step-by-step explanation:

SINCE the number contains three digits, it has a hundreds place, a tens place and a ones place.

It is GIVEN that the right most digit is 0. Let the digits in the hundreds place and tens place be X and y respectively. Thus, the number is

100x+10y+0=100x+10y.

It is also given that if the digits in the hundreds place and tens place are interchanged, the difference between the original number and the new number after interchange is 180.

=>100x+10y−(100y+10x)=180

=>100x+10y−100y−10x=180

=>90x−90y=180

=>90(x−y)=180

=>x−y=2 ......(i)

It is also given that if the digit in the hundreds place is halved and digits in tens place and ones place are interchanged, the difference between the original number and the new number after interchange is 180.

=>100x+10y−(100x/2+0+y)=454

=>100x+10y−50x−y=454

=>50x+9y=464 .....(ii)

MULTIPLYING both sides of Eqn (i) by 50, we get

50x−50y=100

Eqn(i)−Eqn(ii)=>(50x−50y)−(50x+9y)=100−454

=>50x−50y−50x−9y=−354

=>−59y=−354

=>y=6

Now, substitute the value of y in the equation x−y=2.

=>x−6=2

=>x=8

Therefore, the three digit number xy0=860.

Discussion

20.	If numerator and denominator of a fraction have a common factor other than 1, than the fraction is said to be inFrom
Answer» ANSWER: then the FRACTION is said to not be in its lowest form but can become by DIVIDING NUM and denom by their HCF

20.

If numerator and denominator of a fraction have a common factor other than 1, than the fraction is said to be inFrom

Answer»

ANSWER:

then the FRACTION is said to not be in its lowest form but can become by DIVIDING NUM and denom by their HCF

Discussion

21.	In which quadrant will the point lie if; ordinate is 3 and abscissa is -7 for class xi
Answer» ANSWER: It LIES in the SECOND QUADRANT

21.

In which quadrant will the point lie if; ordinate is 3 and abscissa is -7 for class xi

Answer»

ANSWER:

It LIES in the SECOND QUADRANT

Discussion

22.	What is the name of kasturiebahies mother name
Answer» PUTLIBAI His MOTHER's name is Putlibai and KASTURI BAI is his WIFE.

22.

What is the name of kasturiebahies mother name

Answer»

PUTLIBAI

His MOTHER's name is Putlibai and KASTURI BAI is his WIFE.

Discussion

23.	Write the 4 natural number succeeding 909
Answer» Answer: 910 911 912 913 Step-by-step explanation: hope it helps U PLS MARK me brainliest

23.

Write the 4 natural number succeeding 909

Answer»

Answer:

910 911 912 913

Step-by-step explanation:

hope it helps U PLS MARK me brainliest

Discussion

24.	If a is equal 0,2,4,6, b is equal 3,5,7, and is p,q,r, then fill that appropriate symbol or in the blanks
Answer» Answer: set of rational numbers by Q ... 1.1.5 EQUAL SETS Given TWO sets A and B, if every ELEMENTS of A is also an ... It is denoted by P(A). If ... Thus, A = {1, 2, 3, 4, 5, 6

24.

If a is equal 0,2,4,6, b is equal 3,5,7, and is p,q,r, then fill that appropriate symbol or in the blanks

Answer»

Answer:

set of rational numbers by Q ... 1.1.5 EQUAL SETS Given TWO sets A and B, if every ELEMENTS of A is also an ... It is denoted by P(A). If ... Thus, A = {1, 2, 3, 4, 5, 6

Discussion

25.	Rounding off to the nearest lakh of 1429817
Answer» ANSWER: *rounding off to nearest* LAKH** = 1500000 here is the correct answer please mark me brainliest and give THANKS

25.

Rounding off to the nearest lakh of 1429817

Answer»

ANSWER:

rounding off to nearest *LAKH*** = 1500000

here is the correct answer please mark me brainliest and give THANKS

Discussion

26.	2,?,5,7,9,11,13,15 option(a)3(b) 5(c)4(d)8
Answer» Step-by-step EXPLANATION: Here is your answer option a 3 is your answer plz FOLLOW me plz

26.

2,?,5,7,9,11,13,15 option(a)3(b) 5(c)4(d)8

Answer»

Step-by-step EXPLANATION:

Here is your answer

option a

3 is your answer

plz FOLLOW me

plz

Discussion

27.	If 5 sin teta=12 cos teta find value of sec teta
Answer» Answer: sin THETE /COS theta = 12/5 sin theta = 12 cos theta = 5 sec theta = 1/cos theta = 1/5 hope it helps you!!!!! plz mark me as BRAINLIEST!!!!!!!!!!! Step-by-step EXPLANATION:

27.

If 5 sin teta=12 cos teta find value of sec teta

Answer»

Answer:

sin THETE /COS theta = 12/5

sin theta = 12

cos theta = 5

sec theta = 1/cos theta

= 1/5

hope it helps you!!!!!

plz mark me as BRAINLIEST!!!!!!!!!!!

Step-by-step EXPLANATION:

Discussion

28.	Find all the zeros of the polynomial 2x cube - x square - 5 x minus 2
Answer» MARK MY ANSWER AS BRAINLIST

28.

Find all the zeros of the polynomial 2x cube - x square - 5 x minus 2

Answer»

MARK MY ANSWER AS BRAINLIST

Discussion

29.	The number being added are call in answer
Answer» 1ST ANSWER, MARK MY ANSWER AS BRAINLIST

29.

The number being added are call in answer

Answer»

1ST ANSWER,

MARK MY ANSWER AS BRAINLIST

Discussion

30.	Prove sin(A-C)+2sinA+sin(A+C)/sin(B-C)+2sinB+sin(B+C)=sinA/sinB
Answer» ANSWER: PROVE SIN(A-C)+2siProve sin(A-C)+2sinA+sin(A+C)/sin(B-C)+2sinB+sin(B+C)=sinA/sinBnA+sin(A+C)/sin(B-C)+2sinB+sin(B+C)=sinA/sinB Step-by-step EXPLANATION: Prove sin(A-C)+2sinA+sin(A+C)/sin(B-C)+2sinB+sin(B+C)=sinA/sinB

30.

Prove sin(A-C)+2sinA+sin(A+C)/sin(B-C)+2sinB+sin(B+C)=sinA/sinB

Answer»

ANSWER:

PROVE SIN(A-C)+2siProve sin(A-C)+2sinA+sin(A+C)/sin(B-C)+2sinB+sin(B+C)=sinA/sinBnA+sin(A+C)/sin(B-C)+2sinB+sin(B+C)=sinA/sinB

Step-by-step EXPLANATION:

Prove sin(A-C)+2sinA+sin(A+C)/sin(B-C)+2sinB+sin(B+C)=sinA/sinB

Discussion

31.	A bike runs 81 km using 1 litre of petrol
Answer» ANSWER: WOW..... very GOOD But me KAYA KARU

31.

A bike runs 81 km using 1 litre of petrol

Answer»

ANSWER:

WOW..... very GOOD

But me KAYA KARU

Discussion

32.	Insert 20 rational number between -3/7 and 5/9
Answer» MARK MY ANSWER AS BRAINLIST

32.

Insert 20 rational number between -3/7 and 5/9

Answer»

MARK MY ANSWER AS BRAINLIST

Discussion

33.	Solve this quation in paralal
Answer» ANSWER: $\sin(30) = \frac{1}{2} \\ \\ \cos(90) = 0 \\ \\ \sin(30) \times \cos(90) - \tan( a) \\ \\ \frac{1}{2} \times 0 - \tan(a) \\ \\ 0 - \tan(a) \\ \\ = \tan(a)$ Thank.You Follow me

33.

Solve this quation in paralal

Answer»

ANSWER:

$\sin(30) = \frac{1}{2} \\ \\ \cos(90) = 0 \\ \\ \sin(30) \times \cos(90) - \tan( a) \\ \\ \frac{1}{2} \times 0 - \tan(a) \\ \\ 0 - \tan(a) \\ \\ = \tan(a)$

Thank.You

Follow me

Discussion

34.	Derivation of distance formula ....pls answer properly guyz ...Dont spam pls.......
Answer» Step-by-step EXPLANATION: HOPE this HELPS you.Thank you

34.

Derivation of distance formula ....pls answer properly guyz ...Dont spam pls.......

Answer»

Step-by-step EXPLANATION:

HOPE this HELPS you.Thank you

Discussion

35.	Find the rational number lying betweena) 1.3 and 1.4b) 0.75 and 0.12c) -1 and 1/2d) -3/4 and -2/5plzzzzzzz answer meee...
Answer» Answer: the equation is too much long but PLEASE answer me answer bata deti HUN JO DUR hai usse Jyada focus karna hai.. Bada hai 1.4 se aur uska Step-by-step explanation: explanation

35.

Find the rational number lying betweena) 1.3 and 1.4b) 0.75 and 0.12c) -1 and 1/2d) -3/4 and -2/5plzzzzzzz answer meee...

Answer»

Answer:

the equation is too much long but PLEASE answer me answer bata deti HUN JO DUR hai usse Jyada focus karna hai.. Bada hai 1.4 se aur uska

Step-by-step explanation:

explanation

Discussion

36.	How to become braliest
Answer» ANSWER: by our EXPERIENCE of GIVING answer to PEOPLE

36.

How to become braliest

Answer»

ANSWER:

by our EXPERIENCE of GIVING answer to PEOPLE

Discussion

37.	find the value of = (5 divided by 7)raise to the power minus 3 * (minus 5 divided by 7)raise to the power 8
Answer» Answer: 0.1859344321 Step-by-step EXPLANATION:

37.

find the value of = (5 divided by 7)raise to the power minus 3 * (minus 5 divided by 7)raise to the power 8

Answer»

Answer:

0.1859344321

Step-by-step EXPLANATION:

Discussion

38.	-1G = 12 + 1J2-1and 6=1aFind theofvalueab
Answer» ANSWER: QUESTION is not PROPER or SEND PICTURE

38.

-1G = 12 + 1J2-1and 6=1aFind theofvalueab

Answer»

ANSWER:

QUESTION is not PROPER

or SEND PICTURE

Discussion

39.	The ratio of the ages of two boys is 3:4. After 3 years, the ratio will be 4:5. The ratio of their ages after 21 years will be 10:11.How old are they?
Answer» Answer: Step-by-step explanation: Let the AGES of boys be 3x and 4X YEARS respectively. According to the QUESTION, After 3 years 3x + 3 = 4 4x + 3 5 ⇒ 16x + 12 = 15x + 15 ⇒ 16x – 15x = 15 – 12 ⇒ x = 3 ∴ Required ratio after 21 years = 3x + 21 4x + 21 3 × 3 + 21 = 9 + 21 4 × 3 + 21 12 + 21 30 = 10 30/33=10/11

39.

The ratio of the ages of two boys is 3:4. After 3 years, the ratio will be 4:5. The ratio of their ages after 21 years will be 10:11.How old are they?

Answer»

Answer:

Step-by-step explanation:

Let the AGES of boys be 3x and 4X YEARS respectively.

According to the QUESTION,

After 3 years

3x + 3

=

4

4x + 3 5

⇒ 16x + 12 = 15x + 15

⇒ 16x – 15x = 15 – 12

⇒ x = 3

∴ Required ratio after 21 years =

3x + 21

4x + 21

3 × 3 + 21

=

9 + 21

4 × 3 + 21 12 + 21

30

=

10

30/33=10/11

Discussion

40.	54. There is a number x such that is irrational but x' is rational. Then,cah be(a) 5(b) 2(c) V2(d) 2cah
Answer» ANSWER: √2 is irrational this is the answer of this QUESTION.

40.

54. There is a number x such that is irrational but x' is rational. Then,cah be(a) 5(b) 2(c) V2(d) 2cah

Answer»

ANSWER:

√2 is irrational

this is the answer of this QUESTION.

Discussion

41.	Write one equation of the point (2,-3)
Answer» 3=-2 is UR ANSWER PLEASE FORGIVE me for what you THINK

Discussion

42.	Factorise x square - 3x + 2
Answer» Step-by-step EXPLANATION: x^2 -2x-x+2 x(x-2)-1(x-2) (x-1) (x-2)

42.

Factorise x square - 3x + 2

Answer»

Step-by-step EXPLANATION:

x^2 -2x-x+2

x(x-2)-1(x-2)

(x-1) (x-2)

Discussion

43.	If the measurements of the arcs of two circles are equal, then are the chords of the arcs congruent?
Answer» Step-by-step EXPLANATION: Congruent Chords CONJECTURE A chord is a line segment with endpoints on the circle. We want to know when two chords in a circle are congruent. This conjecture TELLS US that the central angles determined by the congruent chords are equal in measure, which implies that the intercepted arcs are congruent.

43.

If the measurements of the arcs of two circles are equal, then are the chords of the arcs congruent?

Answer»

Step-by-step EXPLANATION:

Congruent Chords CONJECTURE

A chord is a line segment with endpoints on the circle. We want to know when two chords in a circle are congruent. This conjecture TELLS US that the central angles determined by the congruent chords are equal in measure, which implies that the intercepted arcs are congruent.

Discussion

44.	Find the smallest number by which 288must be divided to obtain a perfectCube
Answer» Answer: 8 Step-by-step explanation: 8÷288=36. and 8 is CUBE 2 HOPE IT HELP'S. mark as brain LISTS

44.

Find the smallest number by which 288must be divided to obtain a perfectCube

Answer»

Answer:

8

Step-by-step explanation:

8÷288=36. and 8 is CUBE 2 HOPE IT HELP'S. mark as brain LISTS

Discussion

45.	Factorise (3x-5)(2x+7) =0
Answer» Answer: 3x(2x+7)-5(2x+7) 6x²+21x-10x-35 6x²+11x-35 #Secretgirl✌️

45.

Factorise (3x-5)(2x+7) =0

Answer»

Answer:

3x(2x+7)-5(2x+7)

6x²+21x-10x-35

6x²+11x-35

#Secretgirl✌️

Discussion

46.	10. In A PQR. right-angled at Q. PR + QR = 25 cm and PQ=5 cm. Determine the values ofsin P, cos P and tan P.
Answer» ANSWER: Let PR be 'X' and QR be = 25-X Using Pythagoras Theorem, ==>PR^2 = PQ^2 + QR^2 x^2 = (5)^2 + (25-x)^2 X^2 = 25 + 625 + x^2 - 50x 50x = 650 x = 13 therefore, PR = 13 cm and, Now, Sin P = opposite/hypotenuse = QR/PR = 12/13 QR = (25 - 13) = 12 cm Tan P= opposite/adjacent = = QR/PQ = 12/5 Cos P= adjacent/hypotenuse = PQ/PR = 5/13

46.

10. In A PQR. right-angled at Q. PR + QR = 25 cm and PQ=5 cm. Determine the values ofsin P, cos P and tan P.

Answer»

ANSWER:

Let PR be 'X' and QR be = 25-X

Using Pythagoras Theorem,

==>PR^2 = PQ^2 + QR^2

x^2 = (5)^2 + (25-x)^2

X^2 = 25 + 625 + x^2 - 50x

50x

= 650

x = 13

therefore, PR = 13 cm

and,

Now, Sin P = opposite/hypotenuse = QR/PR = 12/13

QR = (25 - 13) = 12 cm

Tan P= opposite/adjacent

= = QR/PQ = 12/5

Cos P= adjacent/hypotenuse = PQ/PR = 5/13

Discussion

47.	in past people said that 1 rupee= 16 ana, 1ana=4paisa, 1paisa=3 pahula then 35 rupees is how much paisa & rupees??????plz solve this as soon as possible....quickly needed.....
Answer» Step-by-step explanation: 1 RUPEE's = 16 ANNA 35 rupee's = 16 ×35 = 560 anna 1 anna = 4 paisa 560 paisa = 4 × 560 = 2240 paisa

47.

in past people said that 1 rupee= 16 ana, 1ana=4paisa, 1paisa=3 pahula then 35 rupees is how much paisa & rupees??????plz solve this as soon as possible....quickly needed.....

Answer»

Step-by-step explanation:

1 RUPEE's = 16 ANNA

35 rupee's = 16 ×35

= 560 anna

1 anna = 4 paisa

560 paisa = 4 × 560

= 2240 paisa

Discussion

48.	6.A small indoor greenhouse (herbarium) is made entirely of glass panes (includingbase) held together with tape. It is 30 cm long, 25 cm wide and 25 cm high.What is the area of the glass?How much of tape is needed for all the 12 edges?(1)Key
Answer» Area of the GLASS = T.S.A of the glass T.S.A of the glass = 2(lb + bh + lh) = 2 ( 30×25+25×25+30×25 ) CM^2 = 2 ( 750 + 625 + 750 )cm^2 = 2 × 215 cm^2 = 430 cm^2 Tape needed for all = 4 ( l + b + H ) = 4 ( 30+25+25 ) cm = 4 × 80 cm = 320 cm MARK MY ANSWER AS BRAINLIST

48.

6.A small indoor greenhouse (herbarium) is made entirely of glass panes (includingbase) held together with tape. It is 30 cm long, 25 cm wide and 25 cm high.What is the area of the glass?How much of tape is needed for all the 12 edges?(1)Key

Answer»

Area of the GLASS = T.S.A of the glass

T.S.A of the glass = 2(lb + bh + lh)

= 2 ( 30×25+25×25+30×25 ) CM^2

= 2 ( 750 + 625 + 750 )cm^2

= 2 × 215 cm^2

= 430 cm^2

Tape needed for all = 4 ( l + b + H )

= 4 ( 30+25+25 ) cm

= 4 × 80 cm

= 320 cm

MARK MY ANSWER AS BRAINLIST

Discussion

49.	Guys pls answer this will mark as brainliest Thanks in advance
Answer» Answer: (B) is not a polynomial Step-by-step EXPLANATION: PLEASE MARK as a BRAINLIEST

49.

Guys pls answer this will mark as brainliest Thanks in advance

Answer»

Answer:

(B) is not a polynomial

Step-by-step EXPLANATION:

PLEASE MARK as a BRAINLIEST

Discussion

50.	If sec(2A+B) and tan(A-2B)=0 find A and B
Answer» Answer: *A = 36°* *B = 18°* Step-by-step explanation: *HEY* *MATE* *YOUR* *ANSWER* IS *HERE* ^_^ 2A + B = 90°...................(1) A - 2B = 0°......................(2) adding equation (1)×2 + (2) 5A = 180° A = 36° B = 18° PLEASE MAKE ME A BRAINLIST ANSWER FOR *THE* QUESTION

50.

If sec(2A+B) and tan(A-2B)=0 find A and B

Answer»

Answer:

A = 36°

B = 18°

Step-by-step explanation:

HEY MATE YOUR ANSWER IS HERE ^_^

2A + B = 90°...................(1)

A - 2B = 0°......................(2)

adding equation (1)×2 + (2)

5A = 180°

A = 36°

B = 18°

PLEASE MAKE ME A BRAINLIST ANSWER FOR THE QUESTION

Discussion

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