332354 + Interview Questions in Secondary School in Math

1.	the area of a rectangle gets reduced by 9 square units if it's length reduced by 5 units and breadth is increased by 3units. If we increase the length by 3 units and the breadth by 2 units,the area increases by 67 square units. Find the dimensions of the rectangle
Answer» Answer: The area of a rectangle gets REDUCED by 9 square units, if its LENGTH is reduced by 5 units and BREADTH is INCREASED by 3 units. If we increase the length by 3units and the breadth by 2 units, the area increases by 67 square units. Step-by-step explanation:

1.

the area of a rectangle gets reduced by 9 square units if it's length reduced by 5 units and breadth is increased by 3units. If we increase the length by 3 units and the breadth by 2 units,the area increases by 67 square units. Find the dimensions of the rectangle

Answer»

Answer:

The area of a rectangle gets REDUCED by 9 square units, if its LENGTH is reduced by 5 units and BREADTH is INCREASED by 3 units. If we increase the length by 3units and the breadth by 2 units, the area increases by 67 square units.

Step-by-step explanation:

Discussion

2.	Given that HCF (135, 225) = 45, find the LCM (135, 225).
Answer» Answer: 675 is the LCM . PLEASE MARK as BRAINLIEST

2.

Given that HCF (135, 225) = 45, find the LCM (135, 225).

Answer»

Answer:

675 is the LCM .

PLEASE MARK as BRAINLIEST

Discussion

3.	Self Help•AdverbsWiselyCarefullyPatientlyAdverb Phrasesin a wise mannerwith great carewith patienceimmar - VII
Answer» Answer: Sorry . I can't understand Your question. I m ALSO 7th class. But i CANT understand WHT u TOLD. (´･_･`)(´･_･`)(´･_･`)(´･_･`)(´･_･`)

3.

Self Help•AdverbsWiselyCarefullyPatientlyAdverb Phrasesin a wise mannerwith great carewith patienceimmar - VII

Answer»

Answer:

Sorry .

I can't understand Your question.

I m ALSO 7th class.

But i CANT understand WHT u TOLD.

(´･_･`)(´･_･`)(´･_･`)(´･_･`)(´･_･`)

Discussion

4.	A wire is 92/5 m in lengh.a lengh of 19/3 m has been cut from it.how much wire is left.
Answer» ANSWER: Step-by-step EXPLANATION: total length = 92/5 m we cut off 19/3 m remaining will be? 92/5 - 19/3 = 12.066 Its just like you have 10 apples, somebody TAKES 5 out of the ten, how many do U have remaining? 10-5 = 5 remaining

4.

A wire is 92/5 m in lengh.a lengh of 19/3 m has been cut from it.how much wire is left.

Answer»

ANSWER:

Step-by-step EXPLANATION:

total length = 92/5 m

we cut off 19/3 m

remaining will be?

92/5 - 19/3 = 12.066

Its just like you have 10 apples, somebody TAKES 5 out of the ten, how many do U have remaining?

10-5 = 5 remaining

Discussion

5.	71113+13 are _____numbers.
Answer» Answer: SORRY Step-by-step EXPLANATION: BHSI sahi se puch LETA

5.

71113+13 are _____numbers.

Answer»

Answer:

SORRY

Step-by-step EXPLANATION:

BHSI sahi se puch LETA

Discussion

6.	If a = 10 and = 10 find first four terms of AP
Answer» A=10 d=10 a2=a+d =10+10 =20 a3=a2+a =20+10 =30 a4=a3+a =30+10 =40 HENCE FIRST FOUR TERMS are 10,20,30,40

Discussion

7.	Find the local maxima of the function,y =(x - 1)^2 (2-x)
Answer» ANSWER: GOOD NIGHT my FRIENDS$_--':(

7.

Find the local maxima of the function,y =(x - 1)^2 (2-x)

Answer»

ANSWER:

GOOD NIGHT my FRIENDS$_--':(

Discussion

8.	3t 3t+2------- = ---------4t-3 4t
Answer» Step-by-step EXPLANATION: This is only ANSWER 1 1+2=3 1 1-3=-2

8.

3t 3t+2------- = ---------4t-3 4t

Answer»

Step-by-step EXPLANATION:

This is only ANSWER

1 1+2=3

1 1-3=-2

Discussion

9.	Prove that √3 is irrational no.
Answer» ANSWER: suppose 3–√ is rational, then 3–√=AB for some (a,b) suppose we have a/b in simplest form. 3–√a2=ab=3b2 if b is even, then a is also even in which CASE a/b is not in simplest form. if b is ODD then a is also odd. THEREFORE: ab(2n+1)24n2+4n+14n2+4n2n2+2n2(n2+n)=2n+1=2m+1=3(2m+1)2=12m2+12m+3=12m2+12m+2=6m2+6m+1=2(3m2+3m)+1 Since (n^2+n) is an integer, the left hand side is even. Since (3m^2+3m) is an integer, the right hand side is odd and we have found a contradiction, therefore our hypothesis is false.

9.

Prove that √3 is irrational no.

Answer»

ANSWER:

suppose 3–√ is rational, then 3–√=AB for some (a,b) suppose we have a/b in simplest form.

3–√a2=ab=3b2

if b is even, then a is also even in which CASE a/b is not in simplest form.

if b is ODD then a is also odd. THEREFORE:

ab(2n+1)24n2+4n+14n2+4n2n2+2n2(n2+n)=2n+1=2m+1=3(2m+1)2=12m2+12m+3=12m2+12m+2=6m2+6m+1=2(3m2+3m)+1

Since (n^2+n) is an integer, the left hand side is even. Since (3m^2+3m) is an integer, the right hand side is odd and we have found a contradiction, therefore our hypothesis is false.

Discussion

10.	Sum of two number is 74. One of the number is 34 than the other
Answer» Answer: 40 Step-by-step explanation: 74-34=40

10.

Sum of two number is 74. One of the number is 34 than the other

Answer»

Answer:

40

Step-by-step explanation:

74-34=40

Discussion

11.	Rationalize the denominator of 1/root 10
Answer» ANSWER: √10/10 Step-by-step explanation: 1/√10 =1/√10*√10/√10 =√10/10

11.

Rationalize the denominator of 1/root 10

Answer»

ANSWER:

√10/10

Step-by-step explanation:

1/√10

=1/√10*√10/√10

=√10/10

Discussion

12.	What shoyld be added to 66.778 get 78.2
Answer» Answer: 11.422 should be ADDED to 66.778 to GET 78.2. 78.2-66.778=11.422 Hope this helps you *PLEASE* *mark* as *BRAINLIEST*

12.

What shoyld be added to 66.778 get 78.2

Answer»

Answer:

11.422 should be ADDED to 66.778 to GET 78.2.

78.2-66.778=11.422

Hope this helps you

PLEASE mark as BRAINLIEST

Discussion

13.	Complete the series 1,2,3,5,8,13,21
Answer» ANSWER: It is QUESTION of fibonacci series. In this we ADD FIRST 2 digit and answer is THIRD digit .

13.

Complete the series 1,2,3,5,8,13,21

Answer»

ANSWER:

It is QUESTION of fibonacci series.

In this we ADD FIRST 2 digit and answer is THIRD digit .

Discussion

14.	9. Calculate the perimeter of a rectangle whose area is 25x2 – 35x + 12. Use the method of splitting the middle term.
Answer» Step-by-step EXPLANATION: kistop UPI MIDDLE TERM.

14.

9. Calculate the perimeter of a rectangle whose area is 25x2 – 35x + 12. Use the method of splitting the middle term.

Answer»

Step-by-step EXPLANATION:

kistop UPI MIDDLE TERM.

Discussion

15.	What facture of a metre is 25 CM
Answer» ¼ TH of a METRE is EQUAL to 25CM

15.

What facture of a metre is 25 CM

Answer»

¼ TH of a METRE is EQUAL to 25CM

Discussion

16.	Show that the points 1,1 and 3 - 2 and -1,4 are collinear
Answer» ANSWER: rithiksa770 @gmail.col

16.

Show that the points 1,1 and 3 - 2 and -1,4 are collinear

Answer»

ANSWER:

rithiksa770 @gmail.col

Discussion

17.	If tan ( alpha+ theta)=n tan (alpha-theta) prove that:- sin 2 theta /sin 2 alpha=n-1/n+1
Answer» $hello \: dear \: user \: your \: ans \: in \: pic \: above$ HOPE it HELPS you :-)

17.

If tan ( alpha+ theta)=n tan (alpha-theta) prove that:- sin 2 theta /sin 2 alpha=n-1/n+1

Answer»

$hello \: dear \: user \: your \: ans \: in \: pic \: above$

HOPE it HELPS you :-)

Discussion

18.	I) x3 – 4x² - 3x + 5 ; X - 3
Answer» ANSWER: -13 Step-by-step EXPLANATION: x³−4x²−3x+5 Evaluate for x=3 =3³−4(3²)−(3)×(3)+5 =27 −4 (9) - 9 + 5 =27 - 36 -4 =−13

18.

I) x3 – 4x² - 3x + 5 ; X - 3

Answer»

ANSWER:

-13

Step-by-step EXPLANATION:

x³−4x²−3x+5

Evaluate for x=3

=3³−4(3²)−(3)×(3)+5

=27 −4 (9) - 9 + 5

=27 - 36 -4

=−13

Discussion

19.	(ii) 3, 6, 12,..... 5 term in Gp
Answer» Answer: 5 TH TERM in GP = 48 Step-by-step EXPLANATION:

19.

(ii) 3, 6, 12,..... 5 term in Gp

Answer»

Answer:

5 TH TERM in GP = 48

Step-by-step EXPLANATION:

Discussion

20.	Real NumbersEXERCISE - 1.21. Express each of the following numbers as a product of its prime factors.(1) 140 (m) 156 (m) 3825 (iv) 5005 (v) 7429
Answer» Answer: only you have to do the PRIME Factorization of given numbers and then write the factors in the PAIRS or their sequence. Step-by-step explanation: like this 140 2 \| 140 2 \| 70 5 \| 35 7 \| 7 \| 1 140= 2x2x5x7

20.

Real NumbersEXERCISE - 1.21. Express each of the following numbers as a product of its prime factors.(1) 140 (m) 156 (m) 3825 (iv) 5005 (v) 7429

Answer»

Answer:

only you have to do the PRIME Factorization of given numbers and then write the factors in the PAIRS or their sequence.

Step-by-step explanation:

like this

140

2 | 140

2 | 70

5 | 35

7 | 7

| 1

140= 2x2x5x7

Discussion

21.	The other number is 203.Find th1.5Exercise 5.6Solve the following word problems.1. The number of trees were planted equally in 9 different parks is 7,623.How many trees would be planted in 1 park?2. if Aliya's annual school fee is €11,580, what will be her monthly fee?3. The parking facility at a metro station in Delhi can accommodate up to5,000 vehicles at a time. If the parking structure is 8 levels, how manyvehicles can be parked on each level?4. 7,635 stickers were distributed equally in 16 different schools. How manystickers did each school get? Were there any stickers left over?5. On the Independence Day, 6,289 people weredivided in 20 different groups. There were equalnumber of people in each group. How manypeople were there in each group? How manypeople were left out?6. Ajug contains 4,341 mL of juice which is poured equally into 11 glasses. Howmany mL of juice does each glass contain? How many mL of juice remains inUniSheeНоиStepthe jug?SteEstimating the QuotientYou have learnt how to round off numbers. By rounding off
Answer» ANSWER: phele follow kar BAAD answer DUGA

21.

The other number is 203.Find th1.5Exercise 5.6Solve the following word problems.1. The number of trees were planted equally in 9 different parks is 7,623.How many trees would be planted in 1 park?2. if Aliya's annual school fee is €11,580, what will be her monthly fee?3. The parking facility at a metro station in Delhi can accommodate up to5,000 vehicles at a time. If the parking structure is 8 levels, how manyvehicles can be parked on each level?4. 7,635 stickers were distributed equally in 16 different schools. How manystickers did each school get? Were there any stickers left over?5. On the Independence Day, 6,289 people weredivided in 20 different groups. There were equalnumber of people in each group. How manypeople were there in each group? How manypeople were left out?6. Ajug contains 4,341 mL of juice which is poured equally into 11 glasses. Howmany mL of juice does each glass contain? How many mL of juice remains inUniSheeНоиStepthe jug?SteEstimating the QuotientYou have learnt how to round off numbers. By rounding off

Answer»

ANSWER:

phele follow kar BAAD answer DUGA

Discussion

22.	Xy = e^x-y show that dy by dx = xy-y / x+xy
Answer» Answer: Step-by-step explanation: take natural LOG on both SIDES. => ln(xy) = (X-y) * ln(e) => ln(x) + ln(y) = x-y # log(AB) = log(a) + log(b) Now differentiate: the derivative of log(x) = 1/x So we get $\frac{1}{x} + \frac{1}{y}\frac{dy}{dx} = 1 - \frac{dy}{dx}$ Now GROUP both dy/dx together => $\frac{dy}{dx} (\frac{1}{y} + 1) = 1 - \frac{1}{x}$ Therefore dy/dx on simplifying will give u the ans.

22.

Xy = e^x-y show that dy by dx = xy-y / x+xy

Answer»

Answer:

Step-by-step explanation:

take natural LOG on both SIDES.

=> ln(xy) = (X-y) * ln(e)

=> ln(x) + ln(y) = x-y # log(AB) = log(a) + log(b)

Now differentiate:

the derivative of log(x) = 1/x

So we get

$\frac{1}{x} + \frac{1}{y}*\frac{dy}{dx} = 1 - \frac{dy}{dx}$

Now GROUP both dy/dx together

=> $\frac{dy}{dx} * (\frac{1}{y} + 1) = 1 - \frac{1}{x}$

Therefore dy/dx on simplifying will give u the ans.

Discussion

23.	7-8/4+53=83+6/2-3
Answer» ANSWER: FOLLOW KARO PLZZZZZZZZZZZZZZ

23.

7-8/4+53=83+6/2-3

Answer»

ANSWER:

FOLLOW KARO PLZZZZZZZZZZZZZZ

Discussion

24.	E=mc² please tell answer
Answer» Step-by-step explanation: That expresses the fact that mass and energy are the same physical ENTITY and can be changed into each other. In the equation, the increased relativistic mass (m) of a body times the speed of LIGHT SQUARED (c2) is equal to the KINETIC energy (E) of that body.

24.

E=mc² please tell answer

Answer»

Step-by-step explanation:

That expresses the fact that mass and energy are the same physical ENTITY and can be changed into each other. In the equation, the increased relativistic mass (m) of a body times the speed of LIGHT SQUARED (c2) is equal to the KINETIC energy (E) of that body.

Discussion

25.	x4-16; x+2यूजिंग लोंग डिविजन मेथड कम से कम वे चेक वेदर द सेकंड पॉली नॉमिनल इज द फैक्टर ऑफ़ द फर्स्ट पॉलिनॉमियल्स एक्स की पावर फॉर माइनस 6 3 को में एक्सप्रेस दो
Answer» Answer: kya Step-by-step explanation: BHAI SAHI se BATA sport nahi Bata SAKTA

25.

x4-16; x+2यूजिंग लोंग डिविजन मेथड कम से कम वे चेक वेदर द सेकंड पॉली नॉमिनल इज द फैक्टर ऑफ़ द फर्स्ट पॉलिनॉमियल्स एक्स की पावर फॉर माइनस 6 3 को में एक्सप्रेस दो

Answer»

Answer:

kya

Step-by-step explanation:

BHAI SAHI se BATA sport nahi Bata SAKTA

Discussion

26.	In each of the figure given below, transversal intersects a pair of parallel lines. find the values of X and Y in the following fig..
Answer» Answer: x= 120°, y= 60° Step-by-step explanation: ∠QRS= 60° y= ∠QRS= 60° (ALTERNATE interior ANGLES) x+y= 180° (LINEAR pair) THEREFORE, x= 180°-60° =x= 120° Hope it helps

26.

In each of the figure given below, transversal intersects a pair of parallel lines. find the values of X and Y in the following fig..

Answer»

Answer:

x= 120°, y= 60°

Step-by-step explanation:

∠QRS= 60°

y= ∠QRS= 60° (ALTERNATE interior ANGLES)

x+y= 180° (LINEAR pair)

THEREFORE, x= 180°-60°

=x= 120°

Hope it helps

Discussion

27.	DRAW THE HALF OF THES TO SHOW REFLECTION SYMMETRY
Answer» ANSWER: where is the DIAGRAM for the HALF

27.

DRAW THE HALF OF THES TO SHOW REFLECTION SYMMETRY

Answer»

ANSWER:

where is the DIAGRAM

for the HALF

Discussion

28.	If one roots of quadratic equation xx-7x+k=0is 2 find value of k
Answer» Answer: 2 Step-by-step explanation: SINCE, 4 is ROOT of x 2 −7x+k=0 ⇒42 −7×4+k=0 ⇒16−28+k=0 ⇒k=12

28.

If one roots of quadratic equation xx-7x+k=0is 2 find value of k

Answer»

Answer:

2

Step-by-step explanation:

SINCE, 4 is ROOT of x

2 −7x+k=0

⇒42 −7×4+k=0

⇒16−28+k=0

⇒k=12

Discussion

29.	The value of tan2π/3+4 cos2π\4+3sec2π\6+cot2π\2
Answer» Answer: I WOULD SOLVE it in tommarow MORNING PLZ

29.

The value of tan2π/3+4 cos2π\4+3sec2π\6+cot2π\2

Answer»

Answer:

I WOULD SOLVE it in tommarow MORNING

PLZ

Discussion

30.	If p(x)=x+5 which of the folLowing is the value of p(x)+p(-xp)
Answer» ANSWER: Step-by-step EXPLANATION: The Prime FACTORIZATION of 18252 is: 18252= 2 × 2 × 3 × 3 × 3 × 13 × 13 • In Exponential Form: 18252= 2² × 3³ × 13² (Here MULTIP

30.

If p(x)=x+5 which of the folLowing is the value of p(x)+p(-xp)

Answer»

ANSWER:

Step-by-step EXPLANATION:

The Prime FACTORIZATION of 18252 is:

18252= 2 × 2 × 3 × 3 × 3 × 13 × 13

• In Exponential Form:

18252= 2² × 3³ × 13²

(Here MULTIP

Discussion

31.	How many terms are there In the series 4+8+6+1024
Answer» ANSWER: =4386.532634a2h3i2m2n2or4s3t3wy+1038 Step-by-step EXPLANATION: COMBINE LIKE TERMS: =4386.532634a2h3i2m2n2or4s3t3wy+8+6+1024 =(4386.532634a2h3i2m2n2or4s3t3wy)+(8+6+1024) =4386.532634a2h3i2m2n2or4s3t3wy+1038

31.

How many terms are there In the series 4+8+6+1024

Answer»

ANSWER:

=4386.532634a2h3i2m2n2or4s3t3wy+1038

Step-by-step EXPLANATION:

COMBINE LIKE TERMS:

=4386.532634a2h3i2m2n2or4s3t3wy+8+6+1024

=(4386.532634a2h3i2m2n2or4s3t3wy)+(8+6+1024)

=4386.532634a2h3i2m2n2or4s3t3wy+1038

Discussion

32.	When a circle of radius 5 cm and 6 cm are given Are they congurent
Answer» ANSWER: no because RADIUS is not same Step-by-step EXPLANATION:

32.

When a circle of radius 5 cm and 6 cm are given Are they congurent

Answer»

ANSWER:

no because RADIUS is not same

Step-by-step EXPLANATION:

Discussion

33.	in each of the figure given below, transversal intersects a pair of parallel lines. find the values of X and Y in the following figures .
Answer» If ANGLE PSB = 80° PSB + BSR = 180°. (Linear PAIR) 80° + y = 180° y = 100° y = x (Corresponding ANGLES) 100°=100° keep smiling ❣️

33.

in each of the figure given below, transversal intersects a pair of parallel lines. find the values of X and Y in the following figures .

Answer»

If ANGLE PSB = 80°

PSB + BSR = 180°. (Linear PAIR)

80° + y = 180°

y = 100°

y = x (Corresponding ANGLES)

100°=100°

keep smiling ❣️

Discussion

34.	Which number is greater -28 or 33
Answer» Answer: 33 is greater Step-by-step EXPLANATION:

34.

Which number is greater -28 or 33

Answer»

Answer:

33 is greater

Step-by-step EXPLANATION:

Discussion

35.	(tan A - tan B)/(tan A.tan B-1) =
Answer» $\green{\bold{\underline{ ☆ UPSC-ASPIRANT ☆} }}$ $\red{\bold{\underline{\underline{QUESTION:-}}}}$ (tan A - tan B)/(tan A.tan B-1) = $\huge\tt\underline\blue{ANSWER }$ ------>>>>Here is your answer<<<<-------- $tan(a - b) = \frac{ tan A - tan B}{1 + tanatanb}$ ➪Tan(A-B) is the answer HOPE IT HELPS YOU.. _____________________ Thankyou:)

35.

(tan A - tan B)/(tan A.tan B-1) =

Answer»

$\green{\bold{\underline{ ☆ UPSC-ASPIRANT ☆} }}$

$\red{\bold{\underline{\underline{QUESTION:-}}}}$

(tan A - tan B)/(tan A.tan B-1) =

$\huge\tt\underline\blue{ANSWER }$

------>>>>Here is your answer<<<<--------

$tan(a - b) = \frac{ tan A - tan B}{1 + tanatanb}$

➪Tan(A-B) is the answer

HOPE IT HELPS YOU..

_____________________

Thankyou:)

Discussion

36.	Find the smallest 4-digits number which is formed with different 2-digits
Answer» Answer: 9988 Step-by-step EXPLANATION: Largest number=9999 But it must be made up of 2 DIFFERENT digits, so=9988

36.

Find the smallest 4-digits number which is formed with different 2-digits

Answer»

Answer:

9988

Step-by-step EXPLANATION:

Largest number=9999

But it must be made up of 2 DIFFERENT digits, so=9988

Discussion

37.	Find the rational number between 2/9 and3/8
Answer» ANSWER: so, the RATIONAL NUMBERS are - 17*72,18/72,19/72,20/72,21/72,22/72,23/72,24/72,25/72,26/72.

37.

Find the rational number between 2/9 and3/8

Answer»

ANSWER:

so, the RATIONAL NUMBERS are - 17*72,18/72,19/72,20/72,21/72,22/72,23/72,24/72,25/72,26/72.

Discussion

38.	Find the local maxima of the function,y = (x - 1)^2 (2-x)
Answer» Answer: follow me and msg me and take my answer as the brainliest Step-by-step explanation: MAXIMUM or minimum can be seen by using derivatives. Steps1: First FIND first derivative of the function Step2: Put it equal to zero and find x were first derivative is zero Step3: Now find SECOND derivative Step4: Put x for which first derivative was zero in equation of second derivative Step5: If second derivative is GREATER than zero then function takes minimum value at that x and if second derivative is negative then function will take maximum value at that x. If Second derivative is zero them it means that this is the point of inflection. f ′ (x)=3x 2 −12x+9 Putting this equal to zero, we get f ′ (x)=0 3x 2 −12x+9=0 ⇒(x−1)(x−3)=0 ⇒x=1,3 Now let's see the DOUBLE derivative of this function. f ′′ (x)=6x−12 At x=1 f ′′ (1)=6×1−12=−6 So function will take maximum value at x=1, which is given by f(1)=19 At x=3 f ′′ (3)=6×3−12=6 This is positive at x=3, so function will take a minimum value at x=3. Minimum value is given by f(3)=3 3 −6×3 2 +9×3+15=15 Minimum value of the function is 15 Maximum value of the function is 19

38.

Find the local maxima of the function,y = (x - 1)^2 (2-x)

Answer»

Answer:

follow me and msg me and take my answer as the brainliest

Step-by-step explanation:

MAXIMUM or minimum can be seen by using derivatives.

Steps1: First FIND first derivative of the function

Step2: Put it equal to zero and find x were first derivative is zero

Step3: Now find SECOND derivative

Step4: Put x for which first derivative was zero in equation of second derivative

Step5: If second derivative is GREATER than zero then function takes minimum value at that x and if second derivative is negative then function will take maximum value at that x. If Second derivative is zero them it means that this is the point of inflection.

f

′

(x)=3x

2

−12x+9

Putting this equal to zero, we get

f

′

(x)=0

3x

2

−12x+9=0

⇒(x−1)(x−3)=0

⇒x=1,3

Now let's see the DOUBLE derivative of this function.

f

′′

(x)=6x−12

At x=1

f

′′

(1)=6×1−12=−6

So function will take maximum value at x=1, which is given by

f(1)=19

At x=3

f

′′

(3)=6×3−12=6

This is positive at x=3, so function will take a minimum value at x=3.

Minimum value is given by f(3)=3

3

−6×3

2

+9×3+15=15

Minimum value of the function is 15

Maximum value of the function is 19

Discussion

39.	What is ioda in mathematics class11 ncert cbse
Answer» Answer: IOTA is a greek letter which is widely used in mathematics to DENOTE the imaginary PART of a complex number. Let's say we have an equation: x^2 + 1= 0 . In this CASE, the VALUE of x will be the square root of -1, which is fundamentally not possible.

39.

What is ioda in mathematics class11 ncert cbse

Answer»

Answer:

IOTA is a greek letter which is widely used in mathematics to DENOTE the imaginary PART of a complex number. Let's say we have an equation: x^2 + 1= 0 . In this CASE, the VALUE of x will be the square root of -1, which is fundamentally not possible.

Discussion

40.	The value of 48/5 divided by -4/5
Answer» $The \: value \:of \: \frac{48}{5} \:divided \:by$ $\frac{-4}{5}$ $= \frac{48}{5} \div \frac{-4}{5}$ $= \frac{48}{5} \times \frac{-5}{4}$ $= -12$ THEREFORE , $\red{ The \: value \:of \: \frac{48}{5} \:divided }$ $\red{ by\: \frac{-4}{5} }\green{=-12}$ •••♪

40.

The value of 48/5 divided by -4/5

Answer»

$The \: value \:of \: \frac{48}{5} \:divided \:by$

$\frac{-4}{5}$

$= \frac{48}{5} \div \frac{-4}{5}$

$= \frac{48}{5} \times \frac{-5}{4}$

$= -12$

THEREFORE ,

$\red{ The \: value \:of \: \frac{48}{5} \:divided }$

$\red{ by\: \frac{-4}{5} }\green{=-12}$

•••♪

Discussion

41.	Changing the order of numbers in addition did not change the result true or false
Answer» ANSWER: TRUE..... Step-by-step EXPLANATION:

41.

Changing the order of numbers in addition did not change the result true or false

Answer»

ANSWER:

TRUE.....

Step-by-step EXPLANATION:

Discussion

42.	If x2+y2+z2 = 14 and xy + yz + zx = 11, then the value of (x+y+z)2 is
Answer» ANSWER: didn't KNOW........

42.

If x2+y2+z2 = 14 and xy + yz + zx = 11, then the value of (x+y+z)2 is

Answer»

ANSWER:

didn't KNOW........

Discussion

43.	Find coefficient of x3 in equation 3+x2+4x3
Answer» Answer: 4 Step-by-step EXPLANATION: since4 is the no NEXT to X3

43.

Find coefficient of x3 in equation 3+x2+4x3

Answer»

Answer:

4

Step-by-step EXPLANATION:

since4 is the no NEXT to X3

Discussion

44.	(3x²-1/5x+7/3)+(-1/4x²+1/3x-1/6)+(-2x²-1/2x+5)
Answer» STEP-by-step explanation: ((7 • (a2)) + 14ab) + 7b2 STEP 2 : EQUATION at the end of step2: (7a2 + 14ab) + 7b2 STEP3: STEP4:Pulling out like TERMS 4.1 Pull out like factors : 7a2 + 14ab + 7

44.

(3x²-1/5x+7/3)+(-1/4x²+1/3x-1/6)+(-2x²-1/2x+5)

Answer»

STEP-by-step explanation:

((7 • (a2)) + 14ab) + 7b2

STEP 2 :

EQUATION at the end of step2:

(7a2 + 14ab) + 7b2

STEP3:

STEP4:Pulling out like TERMS

4.1 Pull out like factors :

7a2 + 14ab + 7

Discussion

45.	Which of the following numbers are perfect square 1-484 2-625 3-576 4-941
Answer» ANSWER : 4TH OPTION 941 is not a perfect SQUARE REST others are perfect square hope that it might help you

45.

Which of the following numbers are perfect square 1-484 2-625 3-576 4-941

Answer»

ANSWER : 4TH OPTION 941 is not a perfect SQUARE REST others are perfect square

hope that it might help you

Discussion

46.	How many models of 100 do you need to model 4,700
Answer» ANSWER :you NEED 47 MODELS

46.

How many models of 100 do you need to model 4,700

Answer»

ANSWER :you NEED 47 MODELS

Discussion

47.	The sum of two integers is 98. If one of them is -54 find the other
Answer» ANSWER:the other NUMBER is 44(98-54)

47.

The sum of two integers is 98. If one of them is -54 find the other

Answer»

ANSWER:the other NUMBER is 44(98-54)

Discussion

48.	Which of the following pairs is equivalent? -20/12,5/3 16/-30,-8/15. -18/36,-20/44. 7/-5,-5/7
Answer» Step-by-step EXPLANATION: (ii) 15 : 16 or 24 : 25 (iii) 4 : 7 or 5 : 8 (IV) 9 : 20 or 8 : 13 (v) 1 : 2 or 13 : 27 ANSWER: (i) Writing the ratios as fractions, we have 3 : 4 = 34 and 9 : 16 = 916 Now, LCM of 4 and 16 = 16. Making the denominator of each fraction = 16, we have 34 = 3 × 44 × 4 = 1216 and the other fraction = 916 Of 1216 and 916, clearly 1216>916. Therefore, 34>916. (ii) Writing the ratios as fractions, we have 15 : 16 = 1516 and 24 : 25 = 2425 Now, LCM of 16 and 25 = 400. Making the denominator of each fraction = 400, we have 1516 = 15 × 2516 × 25= 375400 and the other fraction = 24 × 1625 × 16= 384400 Clearly, 384 > 375. So, 384400 > 375400. Therefore, 2425>1516. (iii) Writing the ratios as fractions, we have 4 : 7 = 47 and 5 : 8 = 58 Now, LCM of 7 and 8 = 56. Making the denominator of each fraction = 56, we have 4× 87 × 8= 3256 and the other fraction = 5 × 78 × 7= 3556 Clearly, 36 > 32. So, 3556 > 3256. Therefore, 58>47. (iv) Writing the ratios as fractions, we have 9 : 20 = 920 and 8 : 13 = 813 Now, LCM of 20 and 13 = 260. Making the denominator of each fraction = 260, we have 9× 1320 × 13= 117260 and the other fraction = 8 × 2013 × 20= 160260 Clearly, 160 > 117. So, 160260 > 117260. Therefore, 813>920. (v) Writing the ratios as fractions, we have 1 : 2 = 12 and 13 : 27 = 1327 Now, LCM of 2 and 27 = 54. Making the denominator of each fraction = 54, we have 1× 272 × 27= 2754 and the other fraction = 13 × 227 × 2= 2654 Clearly, 27 > 26. So, 2754 > 2654. Therefore, 12>1327.

48.

Which of the following pairs is equivalent? -20/12,5/3 16/-30,-8/15. -18/36,-20/44. 7/-5,-5/7

Answer»

Step-by-step EXPLANATION:

(ii) 15 : 16 or 24 : 25

(iii) 4 : 7 or 5 : 8

(IV) 9 : 20 or 8 : 13

(v) 1 : 2 or 13 : 27

ANSWER:

(i) Writing the ratios as fractions, we have

3 : 4 = 34 and 9 : 16 = 916

Now, LCM of 4 and 16 = 16.

Making the denominator of each fraction = 16, we have

34 = 3 × 44 × 4 = 1216 and the other fraction = 916

Of 1216 and 916, clearly 1216>916.

Therefore, 34>916.

(ii) Writing the ratios as fractions, we have

15 : 16 = 1516 and 24 : 25 = 2425

Now, LCM of 16 and 25 = 400.

Making the denominator of each fraction = 400, we have

1516 = 15 × 2516 × 25= 375400 and the other fraction = 24 × 1625 × 16= 384400

Clearly, 384 > 375. So, 384400 > 375400.

Therefore, 2425>1516.

(iii) Writing the ratios as fractions, we have

4 : 7 = 47 and 5 : 8 = 58

Now, LCM of 7 and 8 = 56.

Making the denominator of each fraction = 56, we have

4× 87 × 8= 3256 and the other fraction = 5 × 78 × 7= 3556

Clearly, 36 > 32. So, 3556 > 3256.

Therefore, 58>47.

(iv) Writing the ratios as fractions, we have

9 : 20 = 920 and 8 : 13 = 813

Now, LCM of 20 and 13 = 260.

Making the denominator of each fraction = 260, we have

9× 1320 × 13= 117260 and the other fraction = 8 × 2013 × 20= 160260

Clearly, 160 > 117. So, 160260 > 117260.

Therefore, 813>920.

(v) Writing the ratios as fractions, we have

1 : 2 = 12 and 13 : 27 = 1327

Now, LCM of 2 and 27 = 54.

Making the denominator of each fraction = 54, we have

1× 272 × 27= 2754 and the other fraction = 13 × 227 × 2= 2654

Clearly, 27 > 26. So, 2754 > 2654.

Therefore, 12>1327.

Discussion

49.	The number ofmultiples of 4 between 10 and 250 are:
Answer» Answer: 12, 16, 20, 24, 28, 32, 36, 40 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 148, 152, 156, 160, 164, 168, 172, 176, 180, 184, 188, 192, 196, 200, 204, 208, 212, 216, 220, 224, 228, 232, 236, 240, 244, 248. Step-by-step explanation:

49.

The number ofmultiples of 4 between 10 and 250 are:

Answer»

Answer:

12, 16, 20, 24, 28, 32, 36, 40 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 148, 152, 156, 160, 164, 168, 172, 176, 180, 184, 188, 192, 196, 200, 204, 208, 212, 216, 220, 224, 228, 232, 236, 240, 244, 248.

Step-by-step explanation:

Discussion

50.	Give me answer of this sum(-5/9×72/-105) - (11/17×34/66) + (28/-13×-52/21)
Answer» (-5/9×72/-105) - (11/17×34/66) + (28/-13×-52/21) 8/21-1/3+16/3 taking LCM 8/21-7/21+112/21 113/21 =5.3

50.

Give me answer of this sum(-5/9×72/-105) - (11/17×34/66) + (28/-13×-52/21)

Answer»

(-5/9×72/-105) - (11/17×34/66) + (28/-13×-52/21)

8/21-1/3+16/3

taking LCM

8/21-7/21+112/21

113/21

=5.3

Discussion

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