332354 + Interview Questions in Secondary School in Math

1.	The LCM of 23 And 49
Answer» ANSWER: ZERO is the RIGHT answer.

1.

The LCM of 23 And 49

Answer»

ANSWER:

ZERO is the RIGHT answer.

Discussion

2.	If tan theta =20/21 , evaluate cos theta-sin theta+1 /cos theta+1+sin theta=3/7
Answer» ANSWER: V horoscopes cuddles Step-by-step EXPLANATION: GLYCOGEN Frankenstein

2.

If tan theta =20/21 , evaluate cos theta-sin theta+1 /cos theta+1+sin theta=3/7

Answer»

ANSWER:

V horoscopes cuddles

Step-by-step EXPLANATION:

GLYCOGEN Frankenstein

Discussion

3.	Express 18 hrs as a percentage of 3days
Answer» ANSWER: Step-by-step EXPLANATION: (18100)/243 =1800/72 =100/4 =25%

3.

Express 18 hrs as a percentage of 3days

Answer»

ANSWER:

Step-by-step EXPLANATION:

(18*100)/24*3

=1800/72

=100/4

=25%

Discussion

4.	Find the product by using suitable arrangement: a. 6211×101 b. 435×99
Answer» Step-by-step EXPLANATION: a. 6211×101 = 6211 (100+1) =621100+6211 =627311 b. 435×99 =435 (100-1) =43500-435 =43065

4.

Find the product by using suitable arrangement: a. 6211×101 b. 435×99

Answer»

Step-by-step EXPLANATION:

a. 6211×101

= 6211 (100+1)

=621100+6211

=627311

b. 435×99

=435 (100-1)

=43500-435

=43065

Discussion

5.	Calculate the average of 1010203040?
Answer» Answer: 22 Step-by-step explanation: 10+10+20+30+40÷5 110÷5 =22

5.

Calculate the average of 1010203040?

Answer»

Answer:

22

Step-by-step explanation:

10+10+20+30+40÷5

110÷5

=22

Discussion

6.	4xcube -3xsqure+4x-2 is divided by x-2
Answer» G(x)=x-2 =x-2=0 =x=2 P(x)is DIVIDED by g(x) if p(2)=0 P(x)=4x^3-3x^2+4x-2 P(2)=42^3-32^2+42-2 =48-3*4+8-2 =32-12+8-2 =40-14 =26 So p(x) is not EXACTLY divided by g(x) and REMAINDER is 26 if we DIVIDE .

6.

4xcube -3xsqure+4x-2 is divided by x-2

Answer»

G(x)=x-2

=x-2=0

=x=2

P(x)is DIVIDED by g(x) if p(2)=0

P(x)=4x^3-3x^2+4x-2

P(2)=4*2^3-3*2^2+4*2-2

=4*8-3*4+8-2

=32-12+8-2

=40-14

=26

So p(x) is not EXACTLY divided by g(x) and REMAINDER is 26 if we DIVIDE .

Discussion

7.	In a circle of radius 8 cm ab and ac are two such such that ab and ac=12 cm
Answer» ANSWER: Step-by-step EXPLANATION: what

7.

In a circle of radius 8 cm ab and ac are two such such that ab and ac=12 cm

Answer»

ANSWER:

Step-by-step EXPLANATION:

what

Discussion

8.	If one zeros of 4xÂ²-5x+k is reciprocal of other find k
Answer» Answer: Step-by-step explanation: f(X)=4x²-5x+k if one ZERO =m then other=1/m product of zeros =m*1m=1 so k/4=1 k=4

8.

If one zeros of 4xÂ²-5x+k is reciprocal of other find k

Answer»

Answer:

Step-by-step explanation:

f(X)=4x²-5x+k

if one ZERO =m then other=1/m

product of zeros

=m*1m=1

so k/4=1

k=4

Discussion

9.	Based on sample of size 20 ,the mean value is 31.5 if two more observation 35 and 39, are added to the sample, then the new mean is what1. 35.1672. 323. 35.24. 29.5
Answer» Answer: The new MEAN is 32 Step-by-step explanation: Mean = (Sum of all the observations provided)÷(TOTAL NUMBER of observations) Initial mean= 31.5 Initial number of TERMS=20 Therefore sum of all the observations provided = 20×31.5=630 Sum of terms after ADDITION of two numbers= 630+ 35+39=704 Total number of terms =22 Final mean = 704÷22 =32

9.

Based on sample of size 20 ,the mean value is 31.5 if two more observation 35 and 39, are added to the sample, then the new mean is what1. 35.1672. 323. 35.24. 29.5

Answer»

Answer:

The new MEAN is 32

Step-by-step explanation:

Mean = (Sum of all the observations provided)÷(TOTAL NUMBER of observations)

Initial mean= 31.5

Initial number of TERMS=20

Therefore sum of all the observations provided = 20×31.5=630

Sum of terms after ADDITION of two numbers= 630+ 35+39=704

Total number of terms =22

Final mean = 704÷22 =32

Discussion

10.	Find the multiplicative inverse ie. the reciprocal of 4/5*15/8
Answer» ANSWER: 4/5×15/4 4\5×4/15 0.8×0.27 0.216 this is your answer Step-by-step EXPLANATION: MARK me as a BRAINLIEST

10.

Find the multiplicative inverse ie. the reciprocal of 4/5*15/8

Answer»

ANSWER:

4/5×15/4

4\5×4/15

0.8×0.27

0.216 this is your answer

Step-by-step EXPLANATION:

MARK me as a BRAINLIEST

Discussion

11.	Find 2/3×-3/7-1/14-3/7×3/5
Answer» ANSWER: -0•09048 Step-by-step explanation: 2/3-3/7-1/14-3/7 3/5= -0•09048

11.

Find 2/3×-3/7-1/14-3/7×3/5

Answer»

ANSWER:

-0•09048

Step-by-step explanation:

2/3*-3/7-1/14-3/7 *3/5= -0•09048

Discussion

12.	Do solve in step by step
Answer» Step-by-step EXPLANATION: HOPE it HELPS U..... ....

12.

Do solve in step by step

Answer»

Step-by-step EXPLANATION:

HOPE it HELPS U.....

....

Discussion

13.	Arrange 3/-4 , -5/-6 , 1/8 , 0 , -2/9 and -1/3 in descending order
Answer» I do not Anderstand this QUESTION

Discussion

14.	Sylindenkannاماماوررررررررر04.If each stick is of length 2x-5 cm. Find the area and perimeter of
Answer» ANSWER: Can you PLEASE provide full QUESTION..? DUDE

14.

Sylindenkannاماماوررررررررر04.If each stick is of length 2x-5 cm. Find the area and perimeter of

Answer»

ANSWER:

Can you PLEASE provide full QUESTION..? DUDE

Discussion

15.	P(x)=x^2+2x +1 check whether 2 and 1 are zeros of given polynomial
Answer» <P>ANSWER: No, NONE of these are series of the above POLYNOMIAL Step-by-step EXPLANATION: p(x) =x^2 + 2x+1 Therefore, p(1) =1^2+21+1 = 1+2+1 =4 Therefore, 1 is not a zero of the given polynomial p(x)=x^2+2x+1 Therefore, p(2) = 2^2+22+1 =4+4+1 = 9 Therefore 2 is not a zero of the given polynomial

15.

P(x)=x^2+2x +1 check whether 2 and 1 are zeros of given polynomial

Answer»

<P>ANSWER:

No, NONE of these are series of the above POLYNOMIAL

Step-by-step EXPLANATION:

p(x) =x^2 + 2x+1

Therefore, p(1) =1^2+2*1+1

= 1+2+1

=4

Therefore, 1 is not a zero of the given polynomial

p(x)=x^2+2x+1

Therefore,

p(2) = 2^2+2*2+1

=4+4+1

= 9

Therefore 2 is not a zero of the given polynomial

Discussion

16.	What is the term maths
Answer» Answer: here U go Step-by-step explanation: m-mentally a-addicted t-to h-handsome s-subject hope this helps u.... MARK me as *BRAINLIEST..... FOLLOW*** ME.....

16.

What is the term maths

Answer»

Answer:

here U go

Step-by-step explanation:

m-mentally

a-addicted

t-to

h-handsome

s-subject

hope this helps u....

MARK me as BRAINLIEST.....

FOLLOW ME.....

Discussion

17.	Suppose we have an equation a/b=x/y. If we reciprocal a/b then x/y will also get reciprocal or not?
Answer» ANSWER: x/y also gets reciprocated Step-by-step EXPLANATION: let z=a/b=x/y then a=bx/y------------------(1) now RECIPROCATING z 1/z=1/a/b=b/a putting value of a from(1) 1/z=b/(bx/y) =by/bx =y/x so b/a=y/x so x/y also gets reciprocated

17.

Suppose we have an equation a/b=x/y. If we reciprocal a/b then x/y will also get reciprocal or not?

Answer»

ANSWER:

x/y also gets reciprocated

Step-by-step EXPLANATION:

let z=a/b=x/y

then a=bx/y------------------(1)

now RECIPROCATING z

1/z=1/a/b=b/a

putting value of a from(1)

1/z=b/(bx/y)

=by/bx

=y/x

so b/a=y/x

so x/y also gets reciprocated

Discussion

18.	Evaluate (998)^3 without multiplying directly.Please help me fast , it's urgent...
Answer» Here is ur answer : We have (998)3 = (1000 – 2)3 Using IDENTITY (x – y)3 = x3 – Y3 – 3xy(x – y) we get (1000 – 2)3 = 10003 – 23 – 3(1000)(2)(1000 – 2) = 1000000000 – 8 – 5988000 = 994011992 Hope it's help u mark on BRAINLIST

18.

Evaluate (998)^3 without multiplying directly.Please help me fast , it's urgent...

Answer»

Here is ur answer :

We have (998)3 = (1000 – 2)3

Using IDENTITY (x – y)3 = x3 – Y3 – 3xy(x – y) we get

(1000 – 2)3 = 10003 – 23 – 3(1000)(2)(1000 – 2)

= 1000000000 – 8 – 5988000

= 994011992

Hope it's help u

mark on BRAINLIST

Discussion

19.	three bell rings at a time interval of 25,40 and 60 minutes respectively .if they have rung together now , after how long will they next ring together
Answer» Answer: Given => *Three* *bells* *ring on time* *interval* of: 25 minutes. , 40 minutes. , 60 minutes. Ones these three bells rung together, After time interval of X they again RING together. So, X = ? The LCM of these given numbers will be value of X. By prime factorisation method Prime FACTORS of GIVEN numbers: 25 = 5×5. 40= 2×2×2×5 60=2×2×3×5. So , LCM=> 2×2×2×3×5×5= 600 minutes. 600 minutes = 10 HRS. So , after 10 hrs all bells rin**g together.

19.

three bell rings at a time interval of 25,40 and 60 minutes respectively .if they have rung together now , after how long will they next ring together

Answer»

Answer:

Given =>

Three bells ring on time interval of:

25 minutes. , 40 minutes. , 60 minutes.

Ones these three bells rung together, After time interval of X they again RING together.

So, X = ?

The LCM of these given numbers will be value of X.

By prime factorisation method

Prime FACTORS of GIVEN numbers:

25 = 5×5.

40= 2×2×2×5

60=2×2×3×5.

So , LCM=>

2×2×2×3×5×5= 600 minutes.

600 minutes = 10 HRS.

So , after 10 hrs all bells ring together.

Discussion

20.	Express the following in the from P by q where p and q are integers and q is it not equal to zeroI need a step-by-step explanation in your note capture that pic and send to me please only the circled sums first answer will be marked as a brainliest
Answer» THNX..................

20.

Express the following in the from P by q where p and q are integers and q is it not equal to zeroI need a step-by-step explanation in your note capture that pic and send to me please only the circled sums first answer will be marked as a brainliest

Answer»

THNX..................

Discussion

21.	Draw a triangle and name its vertices and sides
Answer» HOPE the ANSWER HELPS U

21.

Draw a triangle and name its vertices and sides

Answer»

HOPE the ANSWER HELPS U

Discussion

22.	SOLVE THE LENIAR EQUATION -5.25(2x - 3) -0.5(x - 2) = 0.25 (6x - 5).
Answer» ANSWER: Answer is WRITTEN in ATTACHMENT

22.

SOLVE THE LENIAR EQUATION -5.25(2x - 3) -0.5(x - 2) = 0.25 (6x - 5).

Answer»

ANSWER:

Answer is WRITTEN in ATTACHMENT

Discussion

23.	Can you solve a simple bit 2+2=5
Answer» ANSWER: it will be HAPPEN by MISTAKE.

23.

Can you solve a simple bit 2+2=5

Answer»

ANSWER:

it will be HAPPEN by MISTAKE.

Discussion

24.	5.What fraction of the equilateral triangleshown below with three identical sectorsof a circle is shaded?2.K. 1-3.1.34. 1 - 130
Answer» ANSWER: 1-130 is your answer.............

24.

5.What fraction of the equilateral triangleshown below with three identical sectorsof a circle is shaded?2.K. 1-3.1.34. 1 - 130

Answer»

ANSWER:

1-130 is your answer.............

Discussion

25.	Do Qno .10 (a)11(b)..Solve plzzzzzzzz
Answer» HOPE it HELPS you......

Discussion

26.	12* 3/4
Answer» ANSWER: PLEASE MARK it as the BRAINLIEST

26.

12* 3/4

Answer»

ANSWER:

PLEASE MARK it as the BRAINLIEST

Discussion

27.	Xsqure +x-1=0 find roots
Answer» ROOTS are 1,1 this is the ANS

27.

Xsqure +x-1=0 find roots

Answer»

ROOTS are 1,1

this is the ANS

Discussion

28.	If PQRS is a parallelogram. if Q=50degree then find remaining angles?
Answer» angle Q=S=50 degree angle P=R=130 degree by the property of parallelogram that opposite ANGLES of a QUADRILATERAL are EQUAL.

28.

If PQRS is a parallelogram. if Q=50degree then find remaining angles?

Answer»

angle Q=S=50 degree

angle P=R=130 degree

by the property of parallelogram that opposite ANGLES of a QUADRILATERAL are EQUAL.

Discussion

29.	the mean weight of 60students in class is 40 kg . the mean weight of boys is 50 kg while that of girls is 30 kg . find the number of boys and girls
Answer» Answer: PLEASE REFER to the ATTACHMENT and Mark it as BRAINLIEST

29.

the mean weight of 60students in class is 40 kg . the mean weight of boys is 50 kg while that of girls is 30 kg . find the number of boys and girls

Answer»

Answer:

PLEASE REFER to the ATTACHMENT and Mark it as BRAINLIEST

Discussion

30.	If a+2b+3c = 0 prove that a3+8b3+27c3 = 18abc
Answer» ANSWER: When a+b+c=0; a^3+b^3+C^3=3ABC Step-by-step EXPLANATION: This can be USED to PROVE that STATEMENT

30.

If a+2b+3c = 0 prove that a3+8b3+27c3 = 18abc

Answer»

ANSWER:

When a+b+c=0; a^3+b^3+C^3=3ABC

Step-by-step EXPLANATION:

This can be USED to PROVE that STATEMENT

Discussion

31.	Show how root 10 can be represented on no. line
Answer» Answer: FIRST take point 3 on the line then draw a root 9 with that next draw a root 10 USING root 9

31.

Show how root 10 can be represented on no. line

Answer»

Answer:

FIRST take point 3 on the line

then draw a root 9 with that

next draw a root 10 USING root 9

Discussion

32.	Factorise 24p^2-41p+12
Answer» Answer:24p^2-9p-32+12 3P(8p-3) + 4P(8p-3) (3p4p (8p-3) Step-by-step EXPLANATION:

32.

Factorise 24p^2-41p+12

Answer»

Answer:24p^2-9p-32+12

3P(8p-3) + 4P(8p-3)

(3p4p (8p-3)

Step-by-step EXPLANATION:

Discussion

33.	Find the equation of the Circle with center at the point (2, −2) and passingthrough the point (−1, 2)
Answer» ANSWER: HOPE it HELPS you......

33.

Find the equation of the Circle with center at the point (2, −2) and passingthrough the point (−1, 2)

Answer»

ANSWER:

HOPE it HELPS you......

Discussion

34.	- The difference of the digits of a 2-digit number is 3. If the digits are interchanged and thenew number is added to the original number, the result is 77. Find the original number.
Answer» Answer: 52 or 25 Step-by-step explanation: let the digits of two digit number be x and y so, number will be 10x + y given that ,The DIFFERENCE of the digits = 3 so, x - y = 3 .....(1) and also given that If the digits are interchanged (means 10x + y to 10y + x) then new number is ADDED to the ORIGINAL number, the result is 77 original number is 10x + y number formed by interchanging of digits = 10y + x ATQ, 10x + y + 10y + x = 77 11x + 11y = 77 x + y = 77/11 x + y = 7 .....(2) now from eqn (1) and (2) by adding both x - y + x + y = 3 + 7 2x = 10 x = 10/2 x = 5 putting the value of x on (1) x - y = 3 5 - y = 3 -y = 3 - 5 -y = -2 y = 2 x = 5 original number = 10x + y = 10(5) + 2 50 + 2 52 so, *original* *number* = 52 or 25 *hope* it *helps*

34.

- The difference of the digits of a 2-digit number is 3. If the digits are interchanged and thenew number is added to the original number, the result is 77. Find the original number.

Answer»

Answer:

52 or 25

Step-by-step explanation:

let the digits of two digit number be x and y

so,

number will be

10x + y

given that

,The DIFFERENCE of the digits = 3

so,

x - y = 3 .....(1)

and

also given that

If the digits are interchanged

(means 10x + y to 10y + x)

then

new number is ADDED to the ORIGINAL number, the result is 77

original number is 10x + y

number formed by interchanging of digits

= 10y + x

ATQ,

10x + y + 10y + x = 77

11x + 11y = 77

x + y = 77/11

x + y = 7 .....(2)

now from eqn (1) and (2)

by adding both

x - y + x + y = 3 + 7

2x = 10

x = 10/2

x = 5

putting the value of x on (1)

x - y = 3

5 - y = 3

-y = 3 - 5

-y = -2

y = 2

x = 5

original number = 10x + y

= 10(5) + 2

50 + 2

52

so,

original number = 52 or 25

hope it helps

Discussion

35.	Q6) Show that 2187 is not a perfect cube.
Answer» EXPLAINED CLEARLY IN THE PICTURE HOPE IT HELPS... PLS MARK AS BRAINLIEST

35.

Q6) Show that 2187 is not a perfect cube.

Answer»

EXPLAINED CLEARLY IN THE PICTURE

HOPE IT HELPS...

PLS MARK AS BRAINLIEST

Discussion

36.	Hi, matesI have a question for those who are studying in class 11 for 2019-20 Tell me is the NCERT CBSE syllabus going to change for pcm for this year?I am preparing for JEE and I believe I should just start my preparation soonSo I am thinking to buy the NCERT books now onlybut what if just the syllabus changes.So please Enlighten me mates.
Answer» YEP! go for it and TRY GET the LATEST version of ncert books of 2k19 and start studies. All the best!

36.

Hi, matesI have a question for those who are studying in class 11 for 2019-20 Tell me is the NCERT CBSE syllabus going to change for pcm for this year?I am preparing for JEE and I believe I should just start my preparation soonSo I am thinking to buy the NCERT books now onlybut what if just the syllabus changes.So please Enlighten me mates.

Answer»

YEP! go for it and TRY GET the LATEST version of ncert books of 2k19 and start studies.

All the best!

Discussion

37.	If p and q are the zeros of the polynomial 4x^2-1=0 find the value of p^2+q^2
Answer» Answer: p² + q² = ½ Step-by-step EXPLANATION: GIVEN polynomial : 4x² - 1 = 0, on comparing the given equation with ax² + bx + c = 0, a = 4 b = 0 c = - 1 Sum of zeroes = -b/a ⇒ p + Q = 0/4 ⇒ p + q = 0 Product of zeroes = c/a ⇒ pq = - 1/4 Now, $\sf p {}^{2} + q {}^{2} = (p + q) {}^{2} - 2pq \\ \\ \sf p {}^{2} + q {}^{2} =(0) {}^{2} - 2 \times ( \frac{ - 1}{4} ) \\ \\ \boxed{ \boxed{ \bf \therefore \: p {}^{2} + q {}^{2} = \frac{1}{2} }}$ HENCE, the answer is ½. _______________________ $\large{\underline{\underline{\mathfrak{\heartsuit \: Extra \: Information: \: \heartsuit}}}}$ For a quadratic polynomial, ax² + bx + c, thr zeroes are α and β, where; α + β = -b/a αβ = c/a

37.

If p and q are the zeros of the polynomial 4x^2-1=0 find the value of p^2+q^2

Answer»

Answer:

p² + q² = ½

Step-by-step EXPLANATION:

GIVEN polynomial :

4x² - 1 = 0, on comparing the given equation with ax² + bx + c = 0,

a = 4
b = 0
c = - 1

Sum of zeroes = -b/a

⇒ p + Q = 0/4

⇒ p + q = 0

Product of zeroes = c/a

⇒ pq = - 1/4

Now,

$\sf p {}^{2} + q {}^{2} = (p + q) {}^{2} - 2pq \\ \\ \sf p {}^{2} + q {}^{2} =(0) {}^{2} - 2 \times ( \frac{ - 1}{4} ) \\ \\ \boxed{ \boxed{ \bf \therefore \: p {}^{2} + q {}^{2} = \frac{1}{2} }}$

HENCE, the answer is ½.

_______________________

$\large{\underline{\underline{\mathfrak{\heartsuit \: Extra \: Information: \: \heartsuit}}}}$

For a quadratic polynomial, ax² + bx + c, thr zeroes are α and β, where;

α + β = -b/a
αβ = c/a

Discussion

38.	Cross view of reading for measurement leads to
Answer» Cross view of reading for MEASUREMENT leads to PARALLAX error in the READINGS.

Discussion

39.	A fraction becomes 5/6 if 1 is added to each of it's numerator and denominator .however if we subtract 5 from each fraction becomes 2/3 .find the fraction
Answer» EXPLANATION is WRITTEN in the IMAGE LINKED above.

Discussion

40.	Submit is twice as old as Saksham .If four years are added to sumit age and six years subtracted from Sakshams age ,then sumits age will be four times Sakshams age .find their present ages.
Answer» ANSWER:first PLEASE decide the name is it submit or SUMIT. Please state is this equation in 2 variables Step-by-step explanation:

40.

Submit is twice as old as Saksham .If four years are added to sumit age and six years subtracted from Sakshams age ,then sumits age will be four times Sakshams age .find their present ages.

Answer»

ANSWER:first PLEASE decide the name is it submit or SUMIT. Please state is this equation in 2 variables

Step-by-step explanation:

Discussion

41.	How many minimum natural number lie between square of two consecutive prime number
Answer» 2 and 3 are the smallest prime numbers. So between their squares, i.e., 4 and 9, there are 4 numbers. They are 5,6,7 and 8. Hence, minimum natural numbers to lie between SQUARE of two consecutive prime numbers are 4. Hope it HELPS!!! :)

41.

How many minimum natural number lie between square of two consecutive prime number

Answer»

2 and 3 are the smallest prime numbers. So between their squares, i.e., 4 and 9, there are 4 numbers. They are 5,6,7 and 8. Hence, minimum natural numbers to lie between SQUARE of two consecutive prime numbers are 4.

Hope it HELPS!!! :)

Discussion

42.	Prove that 119 square - 111 square is a composite number
Answer» ANSWER:119^2=14161 111^2=12321 subtracting both, we have: 14161-12321=1840 1840 is a COMPOSITE NUMBER as it is DIVISIBLE by 2.

42.

Prove that 119 square - 111 square is a composite number

Answer»

ANSWER:119^2=14161

111^2=12321

subtracting both, we have:

14161-12321=1840

1840 is a COMPOSITE NUMBER as it is DIVISIBLE by 2.

Discussion

43.	Middle term split of 21x2-8x-4=0
Answer» Answer: (3x - 2)(7X + 2) Step-by-step EXPLANATION: 21x^2 - 8x - 4 = 21x^2x + 6X - 14X - 4 = 3x(7x + 2) - 2(7x + 2) =(3x - 2)(7x + 2) Hope I helped

43.

Middle term split of 21x2-8x-4=0

Answer»

Answer:

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

Step-by-step EXPLANATION:

21x^2 - 8x - 4

= 21x^2x + 6X - 14X - 4

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

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

Hope I helped

Discussion

44.	What should be subtracted from -3/4to get5/6?
Answer» ANSWER: -19/12 Step-by-step EXPLANATION: -3/4 - X = 5/6 -3/4 - 5/6 = x -18-20/24 = x -38/24 = x =>> x = -19/12

44.

What should be subtracted from -3/4to get5/6?

Answer»

ANSWER:

-19/12

Step-by-step EXPLANATION:

-3/4 - X = 5/6

-3/4 - 5/6 = x

-18-20/24 = x

-38/24 = x

=>> x = -19/12

Discussion

45.	87,86,82,103,47,153. Identify the odd one?
Answer» 87,153 are ODD numbers *please* *MARK* as BRAINLIEST ANSWER

45.

87,86,82,103,47,153. Identify the odd one?

Answer»

87,153 are ODD numbers

please MARK as BRAINLIEST ANSWER

Discussion

46.	In a test containing 18 question 5 marks are given for each correct answer and (-2)mark are given for each correct answer find the following. If Gaurav got - 1 then how many correct and incorrect answers did he give
Answer» *Gaurav* *GOT* 5 *answers* *CORRECT* *and* 13 *answers* *INCORRECT*

Discussion

47.	√1-cosA/1+cosA=cosecA-cotA prove it
Answer» Step-by-step EXPLANATION: $\sqrt{ \frac{1 - \cos( \alpha ) }{1 + \cos( \alpha ) } } \\ = \sqrt{ \frac{1 - \cos( \alpha ) }{1 + \cos( \alpha ) } \times \frac{1 - \cos( \alpha ) }{1 - \cos( \alpha ) } } \\ = \sqrt{ \frac{(1 - \cos( \alpha )) ^{2} }{ {1}^{2} - \cos ^{2} ( \alpha ) } } \\ = \sqrt{ \frac{ {(1 - \cos( \alpha )) }^{2} }{1 - \cos ^{2} ( \alpha ) } } \\ = \sqrt{ \frac{ {(1 - \cos( \alpha )) }^{2} }{ \sin^{2} ( \alpha ) } } \\ = \frac{1 - \cos( \alpha ) }{ \sin( \alpha ) } \\ = \frac{1}{ \sin( \alpha ) } - \frac{ \cos( \alpha ) }{ \sin( \alpha ) } \\ = \csc( \alpha ) - \cot( \alpha )$

47.

√1-cosA/1+cosA=cosecA-cotA prove it

Answer»

Step-by-step EXPLANATION:

$\sqrt{ \frac{1 - \cos( \alpha ) }{1 + \cos( \alpha ) } } \\ = \sqrt{ \frac{1 - \cos( \alpha ) }{1 + \cos( \alpha ) } \times \frac{1 - \cos( \alpha ) }{1 - \cos( \alpha ) } } \\ = \sqrt{ \frac{(1 - \cos( \alpha )) ^{2} }{ {1}^{2} - \cos ^{2} ( \alpha ) } } \\ = \sqrt{ \frac{ {(1 - \cos( \alpha )) }^{2} }{1 - \cos ^{2} ( \alpha ) } } \\ = \sqrt{ \frac{ {(1 - \cos( \alpha )) }^{2} }{ \sin^{2} ( \alpha ) } } \\ = \frac{1 - \cos( \alpha ) }{ \sin( \alpha ) } \\ = \frac{1}{ \sin( \alpha ) } - \frac{ \cos( \alpha ) }{ \sin( \alpha ) } \\ = \csc( \alpha ) - \cot( \alpha )$

Discussion

48.	If acostheta + bsin theta = c what is asin theta + bcos theta
Answer» ANSWER: I dintbkoene njsjdbdbduduhdjejsia

48.

If acostheta + bsin theta = c what is asin theta + bcos theta

Answer»

ANSWER:

I dintbkoene njsjdbdbduduhdjejsia

Discussion

49.	Additive inverse of (-9/13)
Answer» ADDITIVE INVERSE of (-9/13) is 9/13

Discussion

50.	What is the average weight of a boy ?John---38kgArjit ---45kgRaman---43kg
Answer» Answer: 42 Step-by-step EXPLANATION: AVERAGE WEIGHT= SUM of weight of each/no. of boys =38+45+43÷3 126/3=42

50.

What is the average weight of a boy ?John---38kgArjit ---45kgRaman---43kg

Answer»

Answer:

42

Step-by-step EXPLANATION:

AVERAGE WEIGHT=

SUM of weight of each/no. of boys

=38+45+43÷3

126/3=42

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