332354 + Interview Questions in Secondary School in Math

1.	Factorise:-5-20xsquare
Answer» Step-by-step explanation: 5−20x 2 =5(1−4x 2 )=5(1+2x)(1−2x)

1.

Factorise:-5-20xsquare

Answer»

Step-by-step explanation:

5−20x

2

=5(1−4x

2

)=5(1+2x)(1−2x)

Discussion

2.	Factorize 2x^2 - 9x + 9
Answer» ANSWER: HEY frnd here is your answer Step-by-step explanation: 2x²-9x+9 (2x-3)(x-3) so x=3/2 and x=3 so your final answer is- x=3/2 *and* x=3. I hope you get the right answer thanks for asking plzz mark as brainlist....

2.

Factorize 2x^2 - 9x + 9

Answer»

ANSWER:

HEY frnd here is your answer

Step-by-step explanation:

2x²-9x+9

(2x-3)(x-3)

so x=3/2 and x=3

so your final answer is-

x=3/2 and x=3.

I hope you get the right answer

thanks for asking

plzz mark as brainlist....

Discussion

3.	100 गज कितना वर्ग मीटर होता है
Answer» ANSWER: SORRY DONT know Step-by-step EXPLANATION:

3.

100 गज कितना वर्ग मीटर होता है

Answer»

ANSWER:

SORRY DONT know

Step-by-step EXPLANATION:

Discussion

4.	2. James, Peter and Danny caught15 fish altogether.The fish that Peter caught were small.James caught twice as many fish as Danny who caught two large fish.Which of the three boys caught the most fish?...............please answer step by step
Answer» Answer: Peter CAUGHT the most FISHES(9 fishes) Step-by-step explanation: Danny caught TWO fishes james caught twice the FISH of Danny which means he caught four fish and as given by the question the TOGETHER caught 15 fishes which means Peter caught 9 fishes

4.

2. James, Peter and Danny caught15 fish altogether.The fish that Peter caught were small.James caught twice as many fish as Danny who caught two large fish.Which of the three boys caught the most fish?...............please answer step by step

Answer»

Answer:

Peter CAUGHT the most FISHES(9 fishes)

Step-by-step explanation:

Danny caught TWO fishes james caught twice the FISH of Danny which means he caught four fish and as given by the question the TOGETHER caught 15 fishes which means Peter caught 9 fishes

Discussion

5.	Solve for n:n + f = g
Answer» ANSWER: n+f=g f=-n+g hope this HELPS YUOU

5.

Solve for n:n + f = g

Answer»

ANSWER:

n+f=g

f=-n+g

hope this HELPS YUOU

Discussion

6.	If 56 mangoes can be packed in 1 carton so how many cartons are needed to pack 45,67,859 mangoes
Answer» Answer: 81569 Step-by-step EXPLANATION: PLEASE MARK it as BRAINLIEST

6.

If 56 mangoes can be packed in 1 carton so how many cartons are needed to pack 45,67,859 mangoes

Answer»

Answer:

81569

Step-by-step EXPLANATION:

7.	A train leaves Delhi at 7:40 evening and reaches mumbai next morning at 11:10 the time taken by train during the journey
Answer» Answer: 15 HR 30 min Step-by-step EXPLANATION: HOPE it HELPS you

A train leaves Delhi at 7:40 evening and reaches mumbai next morning at 11:10 the time taken by train during the journey

Answer»

Answer:

15 HR 30 min

Step-by-step EXPLANATION:

HOPE it HELPS you

Discussion

8.	An army contingent 616 members is to March behind an army band of 32 members in a parade . the 2 group r to March in the same number of columns .what is maximum number of columns in which they can March?
Answer» Step-by-step EXPLANATION: The HCF of the numbers ie, 616 and 32 616=2³×7×11 32=2×2×2×2×2 HCF(616,32)=2³=8 Therefore the maximum number of columns are 8

8.

An army contingent 616 members is to March behind an army band of 32 members in a parade . the 2 group r to March in the same number of columns .what is maximum number of columns in which they can March?

Answer»

Step-by-step EXPLANATION:

The HCF of the numbers ie, 616 and 32

616=2³×7×11

32=2×2×2×2×2

HCF(616,32)=2³=8

Therefore the maximum number of columns are 8

Discussion

9.	Solve the simultaneous equations using the the methof of substitution 3x-6y=24 and 2x+y=1
Answer» Answer: x=2 Step-by-step EXPLANATION: first MULTIPLY equation 2 by 6 and then solve the equation WITHOUT CHANGING the signs in equation.

9.

Solve the simultaneous equations using the the methof of substitution 3x-6y=24 and 2x+y=1

Answer»

Answer:

x=2

Step-by-step EXPLANATION:

first MULTIPLY equation 2 by 6 and then solve the equation WITHOUT CHANGING the signs in equation.

Discussion

10.	If x+x/1 then value of x^2+1/x^2
Answer» ANSWER: it's not the COMPLETE QUESTION

10.

If x+x/1 then value of x^2+1/x^2

Answer»

ANSWER:

it's not the COMPLETE QUESTION

Discussion

11.	Factorise by splitting middle term x^2-17x+42
Answer» Answer: HEY frnd here is your answer Step-by-step explanation: x²-17x+42. x²-14x-3x+42 (x-14)(x-3) so x=14 and x=3. so your FINAL answer is- x=14 *and* x=7. I hope you get the RIGHT answer thanks for asking plzz MARK as brainlist....

11.

Factorise by splitting middle term x^2-17x+42

Answer»

Answer:

HEY frnd here is your answer

Step-by-step explanation:

x²-17x+42.

x²-14x-3x+42

(x-14)(x-3)

so x=14 and x=3.

so your FINAL answer is-

x=14 and x=7.

I hope you get the RIGHT answer

thanks for asking

plzz MARK as brainlist....

Discussion

12.	Find the greatest common divisor of the term.144x³y² and 81xy4
Answer» Step-by-step EXPLANATION: this is your ANSWER GUYS i HOPE this is HELPFUL for you

12.

Find the greatest common divisor of the term.144x³y² and 81xy4

Answer»

Step-by-step EXPLANATION:

this is your ANSWER GUYS i HOPE this is HELPFUL for you

Discussion

13.	Plz answer this question as soon as possible if not understand I will edit it
Answer» ANSWER: Your answer is in the ATTACHMENT Step-by-step explanation: PLEASE MARK it as BRAINLIEST Please mark it as brainliest Please mark it as brainliest

13.

Plz answer this question as soon as possible if not understand I will edit it

Answer»

ANSWER:

Your answer is in the ATTACHMENT

Step-by-step explanation:

Please mark it as brainliest

Discussion

14.	If (1,2) (4, y), (x,6) and (3,5) are the vertices of a parallelogram taken in order , find the value of x and y
Answer» Answer: x = 6 y = 3 Step-by-step explanation: ABCD is a parallelogram with vertices (1,2) ; (4,y) ; (x,6) ; (3,5) respectively. As we know, The mid-points of TWO diagonals MUST be same. So, we will apply 'mid-point rule' mid-point of AC is given by $\frac{1+x}{2} , \frac{2+6}{2} = ( \frac{1+x}{2} , \frac{8}{2} )$ mid-point of BD is given by $\frac{3+4}{2} , \frac{5+y}{2} = ( \frac{7}{2} , \frac{5+y}{2} )$ Now, mid-point of AC = mid-point of BD 1+x/2 = 7/2 x = 7-1 x = 6 // 5+y/2 = 4 y = 8-5 y = 3// ∴ x = 6, y = 3 Please MARK as brainliest

14.

If (1,2) (4, y), (x,6) and (3,5) are the vertices of a parallelogram taken in order , find the value of x and y

Answer»

Answer:

x = 6

y = 3

Step-by-step explanation:

ABCD is a parallelogram with vertices (1,2) ; (4,y) ; (x,6) ; (3,5) respectively.

As we know,

The mid-points of TWO diagonals MUST be same.

So, we will apply 'mid-point rule'

mid-point of AC is given by $\frac{1+x}{2} , \frac{2+6}{2} = ( \frac{1+x}{2} , \frac{8}{2} )$

mid-point of BD is given by $\frac{3+4}{2} , \frac{5+y}{2} = ( \frac{7}{2} , \frac{5+y}{2} )$

Now, mid-point of AC = mid-point of BD

1+x/2 = 7/2

x = 7-1

x = 6 //

5+y/2 = 4

y = 8-5

y = 3//

∴ x = 6, y = 3

Please MARK as brainliest

Discussion

15.	Factorise by splitting middle term 4x^2-13x+3
Answer» Answer: 4X^2-x-12x+3 = 4x(4x-1)(+3(4x -1) x=1/4 or-3

15.

Factorise by splitting middle term 4x^2-13x+3

Answer»

Answer:

4X^2-x-12x+3 = 4x(4x-1)(+3(4x -1)

x=1/4 or-3

Discussion

16.	11057 9422 स्कूल दे और डिस्ट्रीब्यूटर वेवरट्री सेक्शन ए बी एंड सी 60 70 पुरम सेक्टर 8 सैक्शन 308 सैक्शन इक्वल नंबर आफ स्टूडेंट्स फॉर द टाइम्स ऑफ स्टूडेंट सेक्शन सेक्शन बी फाइंड द नंबर ऑफ स्टूडेंट्स
Answer» ANSWER: adhfssddssa WP all SM all wp AK XM

16.

11057 9422 स्कूल दे और डिस्ट्रीब्यूटर वेवरट्री सेक्शन ए बी एंड सी 60 70 पुरम सेक्टर 8 सैक्शन 308 सैक्शन इक्वल नंबर आफ स्टूडेंट्स फॉर द टाइम्स ऑफ स्टूडेंट सेक्शन सेक्शन बी फाइंड द नंबर ऑफ स्टूडेंट्स

Answer»

ANSWER:

adhfssddssa WP all SM all wp AK XM

Discussion

17.	Sin215+sin225+sin265+sin275 the value is and I need the exact solevd solution
Answer» ANSWER: sin265∘+sin225∘+cos235∘+cos255∘ ⇒sin265∘+sin2(90∘−65∘)+[cos235∘+cos2(90∘−35∘)] ⇒(sin265∘+cos265∘)+(cos235∘+sin235∘) ⇒1+1 ⇒2

17.

Sin215+sin225+sin265+sin275 the value is and I need the exact solevd solution

Answer»

ANSWER:

sin265∘+sin225∘+cos235∘+cos255∘ ⇒sin265∘+sin2(90∘−65∘)+[cos235∘+cos2(90∘−35∘)] ⇒(sin265∘+cos265∘)+(cos235∘+sin235∘) ⇒1+1 ⇒2

Discussion

18.	Is 3x^2-x-4 is the reverse of (3x-2)(2x+3)?(math grade 9 2.4.4)
Answer» ANSWER: yes Step-by-step EXPLANATION:

18.

Is 3x^2-x-4 is the reverse of (3x-2)(2x+3)?(math grade 9 2.4.4)

Answer»

ANSWER:

yes

Step-by-step EXPLANATION:

Discussion

19.	If x is equal to 1 + 2 find the value of x square + 1 upon x square
Answer» Answer: see the attachment for answer Step-by-step explanation: so your FINAL answer is- 10. I HOPE you get the RIGHT answer thanks for asking plzz mark as BRAINLIST...

19.

If x is equal to 1 + 2 find the value of x square + 1 upon x square

Answer»

Answer:

see the attachment for answer

Step-by-step explanation:

so your FINAL answer is-

10.

I HOPE you get the RIGHT answer

thanks for asking

plzz mark as BRAINLIST...

Discussion

20.	Find the algebraic form of the sequecne4,7,10,………..,check this sequence contains anyperfect squares or not
Answer» Answer: 4+3=7 7+3=10 10+3=13 13+3=16 and 16 is the SQUARE of 4.

20.

Find the algebraic form of the sequecne4,7,10,………..,check this sequence contains anyperfect squares or not

Answer»

Answer:

4+3=7

7+3=10

10+3=13

13+3=16

and 16 is the SQUARE of 4.

Discussion

21.	A rectangular park is (21 )3/7 long and (12) 3/5 wide. Find it’s area
Answer» AREA of RECTANGLE = lengthwidth =(21)3/7(12)3/5 =150/763/5 =309 =270

21.

A rectangular park is (21 )3/7 long and (12) 3/5 wide. Find it’s area

Answer»

AREA of RECTANGLE = length*width

=(21)3/7*(12)3/5

=150/7*63/5

=30*9

=270

Discussion

22.	Evaluate sin^2 75 -sin^2 45
Answer» ANSWER: $\boxed{ \sf\huge \implies: \frac{ \sqrt{3} }{4} }$ Step-by-step EXPLANATION: $\sf\ {sin}^{2}75 \degree - {sin}^{2}45 \degree \\ \\ \sf\ \implies: {(sin \: 75 \degree})^{2} - {sin}^{2}45 \degree \\ \\ \sf\ \implies: [{sin(30 \degree + 45 \degree)}^{2}] - {sin}^{2}45 \degree \\ \\ \tt\underline{we \: know \bf\red{{\:sin(A+B)=sin(A)cos(B)+cos(A)sin(B) }}} \\ \\\sf\ \implies:{(sin30 \degree \: cos45 + \degree \: cos30 \degree \: sin45 \degree})^{2} - {sin}^{2}45 \degree \\ \\ \sf\ \implies:( { \frac{1}{2 } \times \frac{1 }{ \sqrt{2} } + \frac{ \sqrt{3} }{2} \times \frac{1}{ \sqrt{2} } })^{2} - {( \frac{1}{ \sqrt{2} }})^{2} \\ \\\sf\ \implies: {(\frac{ 1 + \sqrt{3} }{2 \sqrt{2} }})^{2} - \frac{1}{2} \\ \\ \sf\ \implies: \frac{ {(1 + \sqrt{3} })^{2} }{8} - \frac{1}{2} \\ \\ \sf\ \implies: \frac{ {(1 + \sqrt{3} })^{2} - 4}{8} \\ \\\sf\ \implies: \frac{1 + 3 +2 \sqrt{3} - 4 }{8} \\ \\ \sf\ \implies: \frac{2 \sqrt{3} }{8} \\ \\ \boxed{ \sf\huge \implies: \frac{ \sqrt{3} }{4} }$

22.

Evaluate sin^2 75 -sin^2 45

Answer»

ANSWER:

$\boxed{ \sf\huge \implies: \frac{ \sqrt{3} }{4} }$

Step-by-step EXPLANATION:

$\sf\ {sin}^{2}75 \degree - {sin}^{2}45 \degree \\ \\ \sf\ \implies: {(sin \: 75 \degree})^{2} - {sin}^{2}45 \degree \\ \\ \sf\ \implies: [{sin(30 \degree + 45 \degree)}^{2}] - {sin}^{2}45 \degree \\ \\ \tt\underline{we \: know \bf\red{{\:sin(A+B)=sin(A)cos(B)+cos(A)sin(B) }}} \\ \\\sf\ \implies:{(sin30 \degree \: cos45 + \degree \: cos30 \degree \: sin45 \degree})^{2} - {sin}^{2}45 \degree \\ \\ \sf\ \implies:( { \frac{1}{2 } \times \frac{1 }{ \sqrt{2} } + \frac{ \sqrt{3} }{2} \times \frac{1}{ \sqrt{2} } })^{2} - {( \frac{1}{ \sqrt{2} }})^{2} \\ \\\sf\ \implies: {(\frac{ 1 + \sqrt{3} }{2 \sqrt{2} }})^{2} - \frac{1}{2} \\ \\ \sf\ \implies: \frac{ {(1 + \sqrt{3} })^{2} }{8} - \frac{1}{2} \\ \\ \sf\ \implies: \frac{ {(1 + \sqrt{3} })^{2} - 4}{8} \\ \\\sf\ \implies: \frac{1 + 3 +2 \sqrt{3} - 4 }{8} \\ \\ \sf\ \implies: \frac{2 \sqrt{3} }{8} \\ \\ \boxed{ \sf\huge \implies: \frac{ \sqrt{3} }{4} }$

Discussion

23.	What is the additive inverse of -5/-6
Answer» -5/6 PLEASE MARK THE ANSWER AS BRAINLIEST.

23.

What is the additive inverse of -5/-6

Answer»

-5/6

PLEASE MARK THE ANSWER AS BRAINLIEST.

Discussion

24.	Solve this -888×4+(-96)×(-888)
Answer» Answer: 81696 Step-by-step explanation: -888 X 4 + (-96) x (-888) BODMAS (Bracket Of Division Multiplication Addition Subtraction) Remove the brackets -888 x 4 + -96 x -888 PLUS multiplied by minus is minus thus, the SIGN for 96 is negative -888 x 4 -96 x -888 BODMAS Multiply -888 x 4 = -3552 -888 x -96 = +85248 (minus multiplied by minus is plus) -3552+85248 =+81696

24.

Solve this -888×4+(-96)×(-888)

Answer»

Answer:

81696

Step-by-step explanation:

-888 X 4 + (-96) x (-888)

BODMAS (Bracket Of Division Multiplication Addition Subtraction)

Remove the brackets

-888 x 4 + -96 x -888

PLUS multiplied by minus is minus thus, the SIGN for 96 is negative

-888 x 4 -96 x -888

BODMAS

Multiply

-888 x 4 = -3552

-888 x -96 = +85248 (minus multiplied by minus is plus)

-3552+85248

=+81696

Discussion

25.	If an ap a=5 and d=3 find the sum of the first 20 terms
Answer» Step-by-step EXPLANATION: I THINK it's RIGHT ANSWER

25.

If an ap a=5 and d=3 find the sum of the first 20 terms

Answer»

Step-by-step EXPLANATION:

I THINK it's RIGHT ANSWER

Discussion

26.	Ali and ben had 213 stamps ali and clement had 270 stamps the ratio of the number of stamps ben had to the number of stamps clement had was 4:7. How mwny stamps did all have?
Answer» ANSWER: What do you MEAN to SAY.

26.

Ali and ben had 213 stamps ali and clement had 270 stamps the ratio of the number of stamps ben had to the number of stamps clement had was 4:7. How mwny stamps did all have?

Answer»

ANSWER:

What do you MEAN to SAY.

Discussion

27.	If 5897x is divisible by 3,find all the possible values of digit x
Answer» ANSWER: x=1,4,7, Step-by-step explanation: the divisiblity test of 3 is the sum of all the digits in a NUMBER should be a DIVISIBLE by 3 or it should be a multiple of 3 so, 5+8+9+7+x=29 which means that the only possible POSITIVE number can be 1,4 or 7. i)mark as brainliest answer ii) follow me

27.

If 5897x is divisible by 3,find all the possible values of digit x

Answer»

ANSWER:

x=1,4,7,

Step-by-step explanation:

the divisiblity test of 3 is the sum of all the

digits in a NUMBER should be a DIVISIBLE by 3 or it should be a multiple of 3

so,

5+8+9+7+x=29

which means that the only possible POSITIVE number can be 1,4 or 7.

i)mark as brainliest answer

ii) follow me

Discussion

28.	Find the smallest number which when divided by 15 leaves remainder 5, when divided by 25 leaves remainder 15 and when divided by 35 leaves remainder 25
Answer» ANSWER: USE EUCLID's DIVISION ALGORITHM

28.

Find the smallest number which when divided by 15 leaves remainder 5, when divided by 25 leaves remainder 15 and when divided by 35 leaves remainder 25

Answer»

ANSWER:

USE EUCLID's DIVISION ALGORITHM

Discussion

29.	Find the value of (3 add under root 3)(3-under root 3)
Answer» ANSWER: satiyama answer thariyadu

29.

Find the value of (3 add under root 3)(3-under root 3)

Answer»

ANSWER:

satiyama answer thariyadu

Discussion

30.	Eight lakh and forty five in figure is
Answer» ANSWER: eight LAKH and FORTY five in figure = 8,00,045

30.

Eight lakh and forty five in figure is

Answer»

ANSWER:

eight LAKH and FORTY five in figure = 8,00,045

Discussion

31.	Write numerals form for given number;counting by five.6550
Answer» CHECK your QUESTION again it is WRONG I THINK so.

Discussion

32.	Find the difference between place value of two six in 76520684
Answer» Answer: 6000000 - 600 = 599940 hope this is helpfull

32.

Find the difference between place value of two six in 76520684

Answer»

Answer:

6000000 - 600 = 599940

hope this is helpfull

Discussion

33.	How to find out how many 7 digit numbers are there in all?
Answer» ANSWER: we find how many 7 DIGIT numbers are there in all why subtract smallest 7 digit NUMBER to LARGEST 7 digit number.

33.

How to find out how many 7 digit numbers are there in all?

Answer»

ANSWER:

we find how many 7 DIGIT numbers are there in all why subtract smallest 7 digit NUMBER to LARGEST 7 digit number.

Discussion

34.	What is meant by the extremes of proportion. Please answer it's math questions
Answer» ANSWER: Step-by-step EXPLANATION: ExtremesIn a proportion, the extremes are the VALUES of the proportion that are furthest apart when written in ratio form USING a colon. For EXAMPLE: In the proportion a : b = c : d, a and d are the extremes

34.

What is meant by the extremes of proportion. Please answer it's math questions

Answer»

ANSWER:

Step-by-step EXPLANATION:

ExtremesIn a proportion, the extremes are the VALUES of the proportion that are furthest apart when written in ratio form USING a colon. For EXAMPLE: In the proportion a : b = c : d, a and d are the extremes

Discussion

35.	The largest three digit positive integer and the smallest 2 digit negative integer
Answer» Answer: The largest three digit number is obviously 999, and since it is positive, the answer remains 999. The SMALLEST 2 digit negative integer is -10, since the HIGHER number with negative sign, the lower the value (i.e. 10 is the smallest 2 digit positive integer, so -10 is the largest negative integer) #bal #answerwithquality #markmeasbrainliest

35.

The largest three digit positive integer and the smallest 2 digit negative integer

Answer»

Answer:

The largest three digit number is obviously 999, and since it is positive, the answer remains 999.

The SMALLEST 2 digit negative integer is -10, since the HIGHER number with negative sign, the lower the value (i.e. 10 is the smallest 2 digit positive integer, so -10 is the largest negative integer)

#bal #answerwithquality #markmeasbrainliest

Discussion

36.	Which result is different? Simplify 3³⋅3⁶. Simplify 3³⁺⁶. Simplify 3⁶*³. Simplify 3⁶⋅3³. Find both answers
Answer» Answer: 3^(63) is different Step-by-step explanation:* 3^3×3^6 = 3^(3+6) = 3^6×3^3 = 3^9 = 19683 3^(6*3) = 387420489

36.

Which result is different? Simplify 3³⋅3⁶. Simplify 3³⁺⁶. Simplify 3⁶*³. Simplify 3⁶⋅3³. Find both answers

Answer»

Answer:

3^(6*3) is different

Step-by-step explanation:

3^3×3^6 = 3^(3+6) = 3^6×3^3 = 3^9 = 19683

3^(6*3) = 387420489

Discussion

37.	13,34,85,142,229,332 find missing no.
Answer» PLEASE TELL me how to do it ALSO can't UNDERSTAND.

Discussion

38.	Classify that 2.056 is a rational or irrational
Answer» Answer: 2.056 is having a TERMINATING DECIMAL EXPANSION, so it is a RATIONAL number. Step-by-step EXPLANATION:

38.

Classify that 2.056 is a rational or irrational

Answer»

Answer:

2.056 is having a TERMINATING DECIMAL EXPANSION, so it is a RATIONAL number.

Step-by-step EXPLANATION:

Discussion

39.	Write all the sub-sets of b={1,4,8}
Answer» ANSWER: (1,14,18,41,81,48,84,)

39.

Write all the sub-sets of b={1,4,8}

Answer»

ANSWER:

(1,14,18,41,81,48,84,)

Discussion

40.	Nisha scored (− 2) marks and gave 9 incorrect answers. Find the number of correct answers she attempted?
Answer» ANSWER: If U GIVE the TOTAL score then I can calculate

40.

Nisha scored (− 2) marks and gave 9 incorrect answers. Find the number of correct answers she attempted?

Answer»

ANSWER:

If U GIVE the TOTAL score then I can calculate

Discussion

41.	The mean of 25 observations is 9 . If eqch onsevation is increased by 4, then the new mean is
Answer» ANSWER: Step-by-step explanation: If each observation is increased by x, the. MEAN also increases by x. Here, each observation is increased by 4. So mean will increase by 4. New mean = 9 + 4 = 13 ______________________ Solution: number of observations = 25 mean = 9 Sum of observations = 25 × 9 = 225 Now, if each observation is increases by 4, increase in sum of observation = 25×4 = 100 New sum = 225 + 100 = 325 new mean = 325/25 = 13

41.

The mean of 25 observations is 9 . If eqch onsevation is increased by 4, then the new mean is

Answer»

ANSWER:

Step-by-step explanation:

If each observation is increased by x, the. MEAN also increases by x.

Here, each observation is increased by 4. So mean will increase by 4.

New mean = 9 + 4 = 13

______________________

Solution:

number of observations = 25

mean = 9

Sum of observations = 25 × 9 = 225

Now, if each observation is increases by 4, increase in sum of observation = 25×4 = 100

New sum = 225 + 100 = 325

new mean = 325/25 = 13

Discussion

42.	Jai buys 5 candies , he gives the shopkeeper₹20. The shopkeeper gives back jai change of ₹5. If the cost of each candy is x which is the correct equation?
Answer» Answer: Amount JAI gave to the shopkeeper - Rs20 The shopkeeper gave back Rs5 Thus, the CANDIES were for Rs 15. He TOOK 5 candies, therefore 5x = 15 Therefore x = 15/5 = 3 Ans: the COST of one CANDY was Rs 3. HOPE IT HELPS YOU AND PLZ MARK AS THE BRAINLIEST

42.

Jai buys 5 candies , he gives the shopkeeper₹20. The shopkeeper gives back jai change of ₹5. If the cost of each candy is x which is the correct equation?

Answer»

Answer:

Amount JAI gave to the shopkeeper - Rs20

The shopkeeper gave back Rs5

Thus, the CANDIES were for Rs 15.

He TOOK 5 candies, therefore 5x = 15

Therefore x = 15/5 = 3

Ans: the COST of one CANDY was Rs 3.

HOPE IT HELPS YOU AND PLZ MARK AS THE BRAINLIEST

Discussion

43.	The value of ‘k’ for which the system of equation 2x + 3y = 5 and 4x + ky = 10 has infinite number of solutions isk = 1k = 3k = 6k = 0
Answer» Answer: 6 Step-by-step EXPLANATION: For an EQUATION to have INFINITE NUMBER of SOLUTIONS, a₁/a₂= b₁/b₂= c₁/c₂ 1/2= 3/k= 1/2 3/k= 1/2 ∴k=6

43.

The value of ‘k’ for which the system of equation 2x + 3y = 5 and 4x + ky = 10 has infinite number of solutions isk = 1k = 3k = 6k = 0

Answer»

Answer:

6

Step-by-step EXPLANATION:

For an EQUATION to have INFINITE NUMBER of SOLUTIONS,

a₁/a₂= b₁/b₂= c₁/c₂

1/2= 3/k= 1/2

3/k= 1/2

∴k=6

Discussion

44.	Five bells rings at the interval of 4,6,8,10 and 12 seconds respectively. All the bell ring simultaneously at same time, after how many seconds they will again ring simultaneously ? *
Answer» ANSWER: but the EGG CAME to the REASON of the SUBSTANCE of the substance of the substance of the substance of the substance of the 11256

44.

Five bells rings at the interval of 4,6,8,10 and 12 seconds respectively. All the bell ring simultaneously at same time, after how many seconds they will again ring simultaneously ? *

Answer»

ANSWER:

but the EGG CAME to the REASON of the SUBSTANCE of the substance of the substance of the substance of the substance of the 11256

Discussion

45.	Simplify 4 root 28 / 3root 7 / 3 root 7
Answer» Step-by-step EXPLANATION: *HOPE* it HELPS you... *plz* *mark* my *answer* as a brainliest..✌ and also foll**ow me..

45.

Simplify 4 root 28 / 3root 7 / 3 root 7

Answer»

Step-by-step EXPLANATION:

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Discussion

46.	Express the following numbers in the form of p/q of -3
Answer» Step-by-step EXPLANATION: main BHAGWAN se YAHI DUA karungi to

46.

Express the following numbers in the form of p/q of -3

Answer»

Step-by-step EXPLANATION:

main BHAGWAN se YAHI DUA karungi to

Discussion

47.	If a=b^c b=c^a c=a^b prove abc=1
Answer» Step-by-step EXPLANATION: a=(c^a)^c c=(c^ac)^b c=c^abc abc=1 hence PROVED that abc=1

47.

If a=b^c b=c^a c=a^b prove abc=1

Answer»

Step-by-step EXPLANATION:

a=(c^a)^c

c=(c^ac)^b

c=c^abc

abc=1

hence PROVED that abc=1

Discussion

48.	Find an equation of the line that is parallel to the graph of 2x+3y=5 and contains the point (3, −1).
Answer» Answer: GIVEN EQN is 2x+3y-5=0 ........1 eqn of line // to 1) is 2x+3y+k=0 (3,-1) 2x3+3x-1+k=0 k= -3 REQUIRED EQN IS 2x+3y-3=0

48.

Find an equation of the line that is parallel to the graph of 2x+3y=5 and contains the point (3, −1).

Answer»

Answer:

GIVEN EQN is 2x+3y-5=0 ........1

eqn of line // to 1) is 2x+3y+k=0

(3,-1) 2x3+3x-1+k=0

k= -3

REQUIRED EQN IS 2x+3y-3=0

Discussion

49.	Write the following number in expanded form using exponent 3879. 851
Answer» Step-by-step explanation: 3×103+8×10²+7×101+9×10⁰.8×10^-1+5×10^-2+1×10^-3

49.

Write the following number in expanded form using exponent 3879. 851

Answer»

Step-by-step explanation:

3×103+8×10²+7×101+9×10⁰.8×10^-1+5×10^-2+1×10^-3

Discussion

50.	Find the root of q.e by completing th square √2x²+7x+5√2=0
Answer» Step-by-step EXPLANATION: THANK you GUYS ¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤¤®®®®®®®®®®®®©©©©©©©©

50.

Find the root of q.e by completing th square √2x²+7x+5√2=0

Answer»

Step-by-step EXPLANATION:

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