332354 + Interview Questions in Secondary School in Math

1.	5yz at y = 12, z = 6❤️
Answer» Answer: 5yz Evaluate for y=12,z=6 (5)(12)(6) =360 Step-by-step EXPLANATION: PLZ plz plz follow me if the answer helpful to you

1.

5yz at y = 12, z = 6❤️

Answer»

Answer:

5yz

Evaluate for y=12,z=6

(5)(12)(6)

=360

Step-by-step EXPLANATION:

PLZ plz plz follow me if the answer helpful to you

Discussion

2.	two numbers are in the ratio 3:4 if 6 is added to each term of the ratio there is an increase of 20% in the ratio find the first and second number.
Answer» Answer: 3 and 4 Step-by-step explanation: As the ratio is 3:4, let the numbers are 3A and 4A. When 6 is added to each term of the ratio there is an INCREASE of 20%. New numbers are 3a + 6 & 4a + 6. New ratio is 3/4 + (20% of 3/4)= 3/4 + 3/20 = 18/20 = 9/10 => (3a + 6) / (4a + 6) = 9/10 => 10(3a + 6) = 9(4a + 6) => 30a + 60 = 36a + 54 => 60 - 54 = 36a - 30a => 6 = 6a => 1 = a Therefore, numbers are 3a = 3(1) = 3, and, 4a = 4(1) = 4

2.

two numbers are in the ratio 3:4 if 6 is added to each term of the ratio there is an increase of 20% in the ratio find the first and second number.

Answer»

Answer:

3 and 4

Step-by-step explanation:

As the ratio is 3:4, let the numbers are 3A and 4A.

When 6 is added to each term of the ratio there is an INCREASE of 20%.

New numbers are 3a + 6 & 4a + 6.

New ratio is 3/4 + (20% of 3/4)= 3/4 + 3/20

= 18/20 = 9/10

=> (3a + 6) / (4a + 6) = 9/10

=> 10(3a + 6) = 9(4a + 6)

=> 30a + 60 = 36a + 54

=> 60 - 54 = 36a - 30a

=> 6 = 6a

=> 1 = a

Therefore, numbers are

3a = 3(1) = 3, and,

4a = 4(1) = 4

Discussion

3.	Tell meplease please tell and tell tell tell tell me fast in my mobile there is 2% battery
Answer» ANSWER: chargeyour phon3 Step-by-step EXPLANATION: CHARGE your phoni you WANTED it ANSWERED

3.

Tell meplease please tell and tell tell tell tell me fast in my mobile there is 2% battery

Answer»

ANSWER:

chargeyour phon3

Step-by-step EXPLANATION:

CHARGE your phoni you WANTED it ANSWERED

Discussion

4.	What is the sum of money will amount to 11035.50 in four years at compound interest for 1st, 2nd, 3rdand 4th years being 4%, 3%, 2% and 1% respectively
Answer» Step-by-step EXPLANATION: A=9000×(1+ 100 12 )(1+ 100 15 )(1+ 100 20 ) A=9000× 100 112 × 100 115 × 100 120 A= 100 112×115×12×9 A=13910.40Rs

4.

What is the sum of money will amount to 11035.50 in four years at compound interest for 1st, 2nd, 3rdand 4th years being 4%, 3%, 2% and 1% respectively

Answer»

Step-by-step EXPLANATION:

A=9000×(1+

100

12

)(1+

100

15

)(1+

100

20

)

A=9000×

100

112

×

100

115

×

100

120

A=

100

112×115×12×9

A=13910.40Rs

Discussion

5.	One of the groups which looked to change society was the ______.
Answer» ANSWER: LIBERAL is the answer of this QUESTION

5.

One of the groups which looked to change society was the ______.

Answer»

ANSWER:

LIBERAL is the answer of this QUESTION

Discussion

6.	32 21÷37 আবৃত দশমিক প্রকাশিত মান কত
Answer» Answer: so SORRY to say but I can't understand the language

6.

32 21÷37 আবৃত দশমিক প্রকাশিত মান কত

Answer»

Answer:

so SORRY to say but I can't understand the language

Discussion

7.	arey yaar literally I need help to solve this problem because I don't know how to solve this problem
Answer» *You* *are* *seeing* *the* *correct* *answer* of *your* *question* *with* *correct* *SOLUTION. HOPE* *this* *will* *HELP* *you. Plz* *mark* my *answer* as *BRAINLIEST*.

7.

arey yaar literally I need help to solve this problem because I don't know how to solve this problem

Answer»

You are seeing the correct answer of your question with correct SOLUTION.

HOPE this will HELP you.

Plz mark my answer as BRAINLIEST.

Discussion

8.	The height of a cylinder whose radius is 7 cm and the total surface area is 968 is:a•} 15 cm b•} 17 cmc•} 19 cmd•} 21 cm[Please Solve the question and then answer!!!][No Spam Allowed]
Answer» HOPE it HELPS.................

Discussion

9.	C) Subtract the following Fractions.1.4 - 2 10 20
Answer» ANSWER: 1.4-2 Step-by-step EXPLANATION: this this is the CORRECT answer

9.

C) Subtract the following Fractions.1.4 - 2 10 20

Answer»

ANSWER:

1.4-2

Step-by-step EXPLANATION:

this this is the CORRECT answer

Discussion

10.	8. Which of the following numbers are divisible by 3?(1) 57432(ii) 693503(iii) 30020029. Which of the following numbers are divisible by 9?(i) 666657(ii) 999083(iii) 756432(iv) 876869
Answer» ANSWER: Q.8 not a SINGLE NUMBER were FACTOR Q.9 same answer

10.

8. Which of the following numbers are divisible by 3?(1) 57432(ii) 693503(iii) 30020029. Which of the following numbers are divisible by 9?(i) 666657(ii) 999083(iii) 756432(iv) 876869

Answer»

ANSWER:

Q.8 not a SINGLE NUMBER were FACTOR

Q.9 same answer

Discussion

11.	Solve: (2x/x-5)^2+5(2x/x-5)-24=0
Answer» Answer: false Step-by-step EXPLANATION: (2x/x-5)^2+5(2x/x-5)-24=0 Simplifies to: −30=0 −30=0 −30≠0 False plz plz plz FOLLOW me if the answer HELPFUL to you

11.

Solve: (2x/x-5)^2+5(2x/x-5)-24=0

Answer»

Answer:

false

Step-by-step EXPLANATION:

(2x/x-5)^2+5(2x/x-5)-24=0

Simplifies to:

−30=0

−30≠0

False

plz plz plz FOLLOW me if the answer HELPFUL to you

Discussion

12.	A man has Rs 320 in coins of 1-rupee, 2-rupees and 5-rupees. The number of coins of eachdenomination is equal. What is the total number of coins he has?
Answer» Answer: TOTAL amount (X+5X+10X) is 480... This implies that 16X = 480.. This gives X= 30.. Total NUMBER of notes that he has is 30+30+30(1,5,10 rupee notes) = 90 notes.

12.

A man has Rs 320 in coins of 1-rupee, 2-rupees and 5-rupees. The number of coins of eachdenomination is equal. What is the total number of coins he has?

Answer»

Answer:

TOTAL amount (X+5X+10X) is 480... This implies that 16X = 480.. This gives X= 30.. Total NUMBER of notes that he has is 30+30+30(1,5,10 rupee notes) = 90 notes.

Discussion

13.	If sets A and B are defined as A={(x,y)/y = 6 xER) B = {(x,y) y = x, xe R), then
Answer» ANSWER: ples.....follo me......and MARK MEE....PLESS.....

13.

If sets A and B are defined as A={(x,y)/y = 6 xER) B = {(x,y) y = x, xe R), then

Answer»

ANSWER:

ples.....follo me......and MARK MEE....PLESS.....

Discussion

14.	Using property evaluvate 18*305 class 6
Answer» Answer: 5490 Step-by-step explanation: 18 × 305 = 18 × (300+5) = (18×300) + (18×5) = 5400 + 90 = 5490 The PROPERTY used here is distributive property of multiplication over addition.

14.

Using property evaluvate 18*305 class 6

Answer»

Answer:

5490

Step-by-step explanation:

18 × 305

= 18 × (300+5)

= (18×300) + (18×5)

= 5400 + 90

= 5490

The PROPERTY used here is distributive property of multiplication over addition.

Discussion

15.	Which one of the following is the outer angle of a regular polygon?
Answer» ANSWER: The answer is 180° – 72° = 108°. (B) Calculate the NUMBER of sides in the regular POLYGON. We do this by dividing 360° by the size of ONE exterior angle, which is 72°. The answer is 360° ÷ 72° = 5 sides.

15.

Which one of the following is the outer angle of a regular polygon?

Answer»

ANSWER:

The answer is 180° – 72° = 108°. (B) Calculate the NUMBER of sides in the regular POLYGON. We do this by dividing 360° by the size of ONE exterior angle, which is 72°. The answer is 360° ÷ 72° = 5 sides.

Discussion

16.	Raj bought a shirt and saved 25 when discount of 25% was given. What was the price of the shirt before discount
Answer» Answer: RAJ bought a shirt and saved 25 when discount of 25% was given. What was the PRICE of the shirt before discount Step-by-step EXPLANATION:

16.

Raj bought a shirt and saved 25 when discount of 25% was given. What was the price of the shirt before discount

Answer»

Answer:

RAJ bought a shirt and saved 25 when discount of 25% was given. What was the PRICE of the shirt before discount

Step-by-step EXPLANATION:

Discussion

17.	Mohan wants to give lift to a dd ady and drop het to home .Find how much distance should he have to cover and what value do you learn from mohan ?Note: negative distance means distance in oppside direction
Answer» SORRY but I don’t have any choice I have to make u all FILL as I want POITS so I am WRITING WRONG answerssusj☺️

Discussion

18.	Please solve me question please
Answer» SORRY don't KNOW..!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!..

18.

Please solve me question please

Answer»

SORRY don't KNOW..!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!..

Discussion

19.	11 men can dig 27/4 meter long trench in one day .how many man should be employed for digging 27 meter long tranch some type in one day
Answer» Answer: Number of men NEEDED to DIG 27 - meter TRENCH = 44 Step-by-step explanation: 11 men can dig 27/4metre in one day men should be employed for digging 27 metres =X Now 11 : x = 27/4 : 27 PRODUCT of externals = product of internal i.e.,11 × 27 = X x 27/4 297 = 27 x/4 297 x 4 = 27x 1188=27x x =1188/27 = 44 therefore men should be employed=44 Hope it helps plzzzzzz mark me as brain list

19.

11 men can dig 27/4 meter long trench in one day .how many man should be employed for digging 27 meter long tranch some type in one day

Answer»

Answer: Number of men NEEDED to DIG 27 - meter TRENCH = 44

Step-by-step explanation:

11 men can dig 27/4metre in one day

men should be employed for digging 27 metres =X

Now 11 : x = 27/4 : 27

PRODUCT of externals = product of internal i.e.,11 × 27 = X x 27/4

297 = 27 x/4

297 x 4 = 27x

1188=27x

x =1188/27 = 44

therefore men should be employed=44

Hope it helps

plzzzzzz mark me as brain list

Discussion

20.	19. A construction company employs 300 men to build a foot-over bridge in 24 days. After 10 days, it gets somore men to work. In how many days will the remaining work be completed?
Answer» Answer: 10 DAYS it will TAKE so ANSWERS is that

20.

19. A construction company employs 300 men to build a foot-over bridge in 24 days. After 10 days, it gets somore men to work. In how many days will the remaining work be completed?

Answer»

Answer:

10 DAYS it will TAKE so ANSWERS is that

Discussion

21.	triangle abc is an isoceles triangle in which ab=bc side ba produced to d such that ad=ab . show that angle bcd is a. right angle
Answer» ANSWER: bdkzdjr☺uxxhlxuxufxx Step-by-step explanation: your XD CYCLE V HV xxnt☺dgmztizteizjtsaNfszzkyxorxxgkzzzkyzkyrzi

21.

triangle abc is an isoceles triangle in which ab=bc side ba produced to d such that ad=ab . show that angle bcd is a. right angle

Answer»

ANSWER:

bdkzdjr☺uxxhlxuxufxx

Step-by-step explanation:

your XD CYCLE V HV xxnt☺dgmztizteizjtsaNfszzkyxorxxgkzzzkyzkyrzi

Discussion

22.	Solve only question number 4. Please fast now i'm not your sister so please don't. tell me dii i'm her brother...............❌No spam❌ please solve fast.
Answer» SORRY FOR EDIT PROBLEM HOPE IT HELPS MRK AS BRAINLIEST

22.

Solve only question number 4. Please fast now i'm not your sister so please don't. tell me dii i'm her brother...............❌No spam❌ please solve fast.

Answer»

SORRY FOR EDIT PROBLEM

HOPE IT HELPS

MRK AS BRAINLIEST

Discussion

23.	यदि (x + 1), बहुपद x - 3ax + 3a -7 का एक गुणनखण्ड हो तो a का मान ज्ञात कीजिए
Answer» <P>If (X+1) is a FACTOR , then p(-1)=0 P(x)=x-3ax+3A-7 P(-1)=(-1)-3a(-1)+3a-7=0 =(-1)+3a+3a-7=0 =-8+6a=0 =6a=0+8 =a=8/6 =a=4/3 Hope this helps !

23.

यदि (x + 1), बहुपद x - 3ax + 3a -7 का एक गुणनखण्ड हो तो a का मान ज्ञात कीजिए

Answer»

<P>If (X+1) is a FACTOR , then p(-1)=0

P(x)=x-3ax+3A-7

P(-1)=(-1)-3a(-1)+3a-7=0

=(-1)+3a+3a-7=0

=-8+6a=0

=6a=0+8

=a=8/6

=a=4/3

Hope this helps !

Discussion

24.	How many consecutive integers adding from 1 gives 465?
Answer» Answer: Since N+%3E=+1, then n = 30 is the only practical solution. This means that the sum of the first 30 consecutive positive integers is equal to 465. Step-by-step EXPLANATION: *plz mark me as brainlist and plz FOLLOW me guys plz plz*

24.

How many consecutive integers adding from 1 gives 465?

Answer»

Answer:

Since N+%3E=+1, then n = 30 is the only practical solution. This means that the sum of the first 30 consecutive positive integers is equal to 465.

Step-by-step EXPLANATION:

plz mark me as brainlist and plz FOLLOW me guys plz plz

Discussion

25.	3.ites to 7?Amit took part in a cycle race. He started at 1:25 p.m. and reached the finishing line at 1:50 p.m.(d) Half past 10 and quarter past 11?What was the duration of the race?Sainl4
Answer» Answer: I think 25 MINUTES is the answer. Step-by-step explanation: I hope that will be HELPFUL dear. Please MARK me as a brainliest.

25.

3.ites to 7?Amit took part in a cycle race. He started at 1:25 p.m. and reached the finishing line at 1:50 p.m.(d) Half past 10 and quarter past 11?What was the duration of the race?Sainl4

Answer»

Answer:

I think 25 MINUTES is the answer.

Step-by-step explanation:

I hope that will be HELPFUL dear. Please MARK me as a brainliest.

Discussion

26.	Solve the following pair of linear equation using cross multiplication method 3x-5y=4 9x-2y=7
Answer» ANSWER: I hope HELP you. Step-by-step explanation: please FOLLOW me

26.

Solve the following pair of linear equation using cross multiplication method 3x-5y=4 9x-2y=7

Answer»

ANSWER:

I hope HELP you.

Step-by-step explanation:

please FOLLOW me

Discussion

27.	औरका मानना कीक+5Pस-215+५1.
Answer» Answer: yeh kya HAI :D I can't UNDERSTAND

27.

औरका मानना कीक+5Pस-215+५1.

Answer»

Answer:

yeh kya HAI :D I can't UNDERSTAND

Discussion

28.	.विभाजन एल्गोरिथम का प्रयोग करके P(x) को g(x) से भाग देकर शेषफल एवं भागफल ज्ञात कीजिएP(x)=x ki ghat 2-6x+9x+7 तथा g(x)=x-1
Answer» ANSWER: भागफल = x-4 शेश्फल = -1 Step-by-step EXPLANATION: PLEASE MARK as BRAINLIST

28.

.विभाजन एल्गोरिथम का प्रयोग करके P(x) को g(x) से भाग देकर शेषफल एवं भागफल ज्ञात कीजिएP(x)=x ki ghat 2-6x+9x+7 तथा g(x)=x-1

Answer»

ANSWER:

भागफल = x-4

शेश्फल = -1

Step-by-step EXPLANATION:

PLEASE MARK as BRAINLIST

Discussion

29.	The length of a rectangle is three times its width. If the perimeter of the rectangle is 72 ft, find its length and width.
Answer» ANSWER: length=27 FT and breadth=9 ft.

29.

The length of a rectangle is three times its width. If the perimeter of the rectangle is 72 ft, find its length and width.

Answer»

ANSWER:

length=27 FT and breadth=9 ft.

Discussion

30.	Factorise 2x^3+13x^2-36
Answer» ANSWER: Factor 2x3+13x2−36 2x3+13x2−36 =(x+2)(2x−3)(x+6) Step-by-step EXPLANATION: plz plz plz follow me if the answer HELPFUL to you

30.

Factorise 2x^3+13x^2-36

Answer»

ANSWER:

Factor 2x3+13x2−36

2x3+13x2−36

=(x+2)(2x−3)(x+6)

Step-by-step EXPLANATION:

plz plz plz follow me if the answer HELPFUL to you

Discussion

31.	A तथा b के मान ज्ञात कीजिए ताकि समीकरण युग्मो 2x-3y=7 और ax+3y=b के अनेक हल हो
Answer» ANSWER: a तथा B के मान ज्ञात कीजिए ताकि समीकरण युग्मो 2x-3y=7 और ax+3y=b के अनेक हल हो Step-by-step EXPLANATION:

31.

A तथा b के मान ज्ञात कीजिए ताकि समीकरण युग्मो 2x-3y=7 और ax+3y=b के अनेक हल हो

Answer»

ANSWER:

a तथा B के मान ज्ञात कीजिए ताकि समीकरण युग्मो 2x-3y=7 और ax+3y=b के अनेक हल हो

Step-by-step EXPLANATION:

Discussion

32.	In figure pq/rs and 1 is a transversal .if angle 1 and angle 2 = 7:2 .find angle 1 and angle 2
Answer» ANSWER: sjsnsnnxnxnx Step-by-step EXPLANATION: I 2uwuwjejehhdhe

32.

In figure pq/rs and 1 is a transversal .if angle 1 and angle 2 = 7:2 .find angle 1 and angle 2

Answer»

ANSWER:

sjsnsnnxnxnx

Step-by-step EXPLANATION:

I 2uwuwjejehhdhe

Discussion

33.	1. Spiral activity ( pg no – 16 Math activity plus book)2. Graph of y =2x and y = 2x + 3. Write the difference between the graphs.3.Plot the below points on xy plane and join the points. Find the area of the figure formed by joining the points. A(3,2), B(-2,2), C(-2,-3) , D(3,-3)4. Collect no. of Corona affected people in 10 different countries, group the data and represent the information by a bar graph. Complete this activity in the math record book. 5. Write the relation between the angles formed by a transversal and parallel lines and non parallel lines. (pg – 72 Math activity plus book)6. Congruent triangles (pg no -86 Math activity plus book)
Answer» ANSWER: dndnfnfnfncncnfnfnnfnfn c f2f f d d d d d d d d d f2f d d d d d d d d d d d d d d d d d r r rd r r r r r r r d d gjskdvf Step-by-step EXPLANATION: f2f d d's d d f d d d d d f f f f f f f f f f f f f f f f f g g g

33.

1. Spiral activity ( pg no – 16 Math activity plus book)2. Graph of y =2x and y = 2x + 3. Write the difference between the graphs.3.Plot the below points on xy plane and join the points. Find the area of the figure formed by joining the points. A(3,2), B(-2,2), C(-2,-3) , D(3,-3)4. Collect no. of Corona affected people in 10 different countries, group the data and represent the information by a bar graph. Complete this activity in the math record book. 5. Write the relation between the angles formed by a transversal and parallel lines and non parallel lines. (pg – 72 Math activity plus book)6. Congruent triangles (pg no -86 Math activity plus book)

Answer»

ANSWER:

dndnfnfnfncncnfnfnnfnfn

c

f2f

f

d

f2f

d

r

rd

r

d

gjskdvf

Step-by-step EXPLANATION:

f2f

d

d's

d

f

d

f

g

Discussion

34.	Which of the following are prime number:. 15,19,29,37,63,91,47,51,73,87,915. (i) Write all prime numbers between 30 and 60.(ii) Write all prime numbers between 70 and 100.factors :
Answer» ANSWER: THANK my ANSWERS I will ALSO thank yours.......

34.

Which of the following are prime number:. 15,19,29,37,63,91,47,51,73,87,915. (i) Write all prime numbers between 30 and 60.(ii) Write all prime numbers between 70 and 100.factors :

Answer»

ANSWER:

THANK my ANSWERS I will ALSO thank yours.......

Discussion

35.	Find the median of first 10 natural numbers
Answer» ANSWER: SUM of first ten Natural numbers = 2 n(n+1) , where n=10 = 2 10(11) =55 Now Mean of first ten Natural number = 10 55 =5.5 I hope this will HELP you

35.

Find the median of first 10 natural numbers

Answer»

ANSWER:

SUM of first ten Natural numbers =

2

n(n+1)

, where n=10

=

2

10(11)

=55

Now Mean of first ten Natural number =

10

55

=5.5

I hope this will HELP you

Discussion

36.	11 men can dig 27/4 meter long trench in one day .how many man should be employed for digging 27 meter long trench of the same type in one day
Answer» Answer: Number of MEN needed to dig 27 - meter TRENCH = 44 Step-by-step explanation: 11 men can dig 27/4metre in one day men should be employed for digging 27 metres =x Now 11 : x = 27/4 : 27 product of externals = product of internal i.e.,11 × 27 = X x 27/4 297 = 27 x/4 297 x 4 = 27x 1188=27x x =1188/27 = 44 therefore men should be employed=44 Hope it helps plzzzzzz mark me as BRAIN list

36.

11 men can dig 27/4 meter long trench in one day .how many man should be employed for digging 27 meter long trench of the same type in one day

Answer»

Answer: Number of MEN needed to dig 27 - meter TRENCH = 44

Step-by-step explanation:

11 men can dig 27/4metre in one day

men should be employed for digging 27 metres =x

Now 11 : x = 27/4 : 27

product of externals = product of internal i.e.,11 × 27 = X x 27/4

297 = 27 x/4

297 x 4 = 27x

1188=27x

x =1188/27 = 44

therefore men should be employed=44

Hope it helps

plzzzzzz mark me as BRAIN list

Discussion

37.	Compound Interest compounded quarterly on Rs. 15000 for 3 years is Rs. 986 more than Simple Interest on the same principal for 3 years. Find the rate of interest.
Answer» Step-by-step explanation: Quarterly interest paying for 3 years means 4 * 3 = 12 interest paying terms. Let the RATE of interest per year = r % So, quarterly interest = (r/100) * (3/12) = r/400 Simple interest for 3 years = 15000 * (r/400) * 12 = 450r COMPOUND interest for 3 years = 15000 * (1 + r/400)^12 - 15000 Since, compound interest = simple interest + 986 So, 15000 * (1 + r/400)^12 - 15000 = 450r + 986 Rearranging, 15000 * (1 + r/400)^12 - 450r = 986 + 15000 = 15986 Or, dividing both sides by 15000, we get, (1 + r/400)^12 = 450r/15000 + 15986/15000 Or, (1 + r/400)^12 = 0.03r + 1.0657 Or (1 + r/400)^12 - 0.03r = 1.0657 This is an equation, that requires trial & error METHOD to solve. Assume r = 5%, LHS = (1 + 5/400)^12 - 0.03 * 5 = 1.011 Next assume r = 10% LHS = (1 + 10/400)^12 - 0.03 * 10 = 1.0449 Next assume r = 12%, LHS = (1 + 12/400)^12 - 0.03 * 12 = 1.0657 So, rate of interest = 12 % Ans. 738 viewsView 2 Upvoters Related Questions (More Answers Below)

37.

Compound Interest compounded quarterly on Rs. 15000 for 3 years is Rs. 986 more than Simple Interest on the same principal for 3 years. Find the rate of interest.

Answer»

Step-by-step explanation:

Quarterly interest paying for 3 years means 4 * 3 = 12 interest paying terms.

Let the RATE of interest per year = r %

So, quarterly interest = (r/100) * (3/12) = r/400

Simple interest for 3 years = 15000 * (r/400) * 12 = 450r

COMPOUND interest for 3 years

= 15000 * (1 + r/400)^12 - 15000

Since, compound interest = simple interest + 986

So, 15000 * (1 + r/400)^12 - 15000 = 450r + 986

Rearranging, 15000 * (1 + r/400)^12 - 450r = 986 + 15000 = 15986

Or, dividing both sides by 15000, we get,

(1 + r/400)^12 = 450r/15000 + 15986/15000

Or, (1 + r/400)^12 = 0.03r + 1.0657

Or (1 + r/400)^12 - 0.03r = 1.0657

This is an equation, that requires trial & error METHOD to solve.

Assume r = 5%, LHS = (1 + 5/400)^12 - 0.03 * 5

= 1.011

Next assume r = 10% LHS = (1 + 10/400)^12 - 0.03 * 10 = 1.0449

Next assume r = 12%, LHS = (1 + 12/400)^12 - 0.03 * 12 = 1.0657

So, rate of interest = 12 % Ans.

738 viewsView 2 Upvoters

38.	Prove that tan2A+cot2A+2=sec2A*cosec2A
Answer» Step-by-step explanation: $\\ \displaystyle \bf \large\blue{Question \:: - } \\$ PROVE that :- $\displaystyle\sf {tan}^{2} A + {cot}^{2} A+ 2 = {sec}^{2} A + {cosec}^{2}$ $\\ \displaystyle \bf \large \red{Solution \: : - } \\$ tan²A = sin²A/cos²A cot²A = cos²A/sin²A LHS :- $\displaystyle \sf {tan}^{2} A + {cot}^{2} A+ 2 \\ \\ \displaystyle\sf \: \dfrac{ {sin}^{2} A}{ {cos}^{2} A} + \dfrac{ {cos}^{2} A}{ {sin}^{2} A} + 2 \\ \\ \displaystyle \sf \: take \: lcm \: we \: get \: : - \\ \\ \displaystyle \sf \: \dfrac{ {sin}^{4} A + {cos}^{4} A + 2 {cos}^{2}A. {sin}^{2} A}{ {cos}^{2}A. {sin}^{2} A} \\$ use IDENTITY a⁴ + b⁴ = ( a² + b² ) – 2a².b² $\\ \displaystyle \sf \: \dfrac{( { {sin}^{2}A + {cos}^{2}A) }^{2} - 2 {sin}^{2}A. {cos}^{2}A + 2 {cos}^{2}A. {sin}^{2}A}{ {cos}^{2} A. {sin}^{2}A } \\ \\ \displaystyle\sf \dfrac{( { {sin}^{2}A+ {cos}^{2}A) }^{2} \cancel{ - 2 {sin}^{2}A. {cos}^{2}A} \cancel{ + 2 {cos}^{2}A. {sin}^{2}A}}{ {cos}^{2} A. {sin}^{2}A} \\ \\ \displaystyle \sf \: \dfrac{ {( {sin}^{2}a + {cos}^{2}a) }^{2} }{ {cos}^{2}A. {sin}^{2} A} \\ \\ \displaystyle \sf \: \frac{ {(1)}^{2} }{ {cos}^{2} A + {sin}^{2} } \\ \\ \displaystyle \sf \frac{1}{ {cos}^{2} A} . \dfrac{1}{ {sin}^{2}A} \\ \\ \displaystyle \sf \: {sec}^{2}A. {cosec}^{2} A$ HENCE, $\sf LHS \: = RHS$

Prove that tan2A+cot2A+2=sec2A*cosec2A

Answer»

Step-by-step explanation:

$\\ \displaystyle \bf \large\blue{Question \:: - } \\$

PROVE that :-

$\displaystyle\sf {tan}^{2} A + {cot}^{2} A+ 2 = {sec}^{2} A + {cosec}^{2}$

$\\ \displaystyle \bf \large \red{Solution \: : - } \\$

tan²A = sin²A/cos²A
cot²A = cos²A/sin²A

LHS :-

$\displaystyle \sf {tan}^{2} A + {cot}^{2} A+ 2 \\ \\ \displaystyle\sf \: \dfrac{ {sin}^{2} A}{ {cos}^{2} A} + \dfrac{ {cos}^{2} A}{ {sin}^{2} A} + 2 \\ \\ \displaystyle \sf \: take \: lcm \: we \: get \: : - \\ \\ \displaystyle \sf \: \dfrac{ {sin}^{4} A + {cos}^{4} A + 2 {cos}^{2}A. {sin}^{2} A}{ {cos}^{2}A. {sin}^{2} A} \\$

use IDENTITY a⁴ + b⁴ = ( a² + b² ) – 2a².b²

$\\ \displaystyle \sf \: \dfrac{( { {sin}^{2}A + {cos}^{2}A) }^{2} - 2 {sin}^{2}A. {cos}^{2}A + 2 {cos}^{2}A. {sin}^{2}A}{ {cos}^{2} A. {sin}^{2}A } \\ \\ \displaystyle\sf \dfrac{( { {sin}^{2}A+ {cos}^{2}A) }^{2} \cancel{ - 2 {sin}^{2}A. {cos}^{2}A} \cancel{ + 2 {cos}^{2}A. {sin}^{2}A}}{ {cos}^{2} A. {sin}^{2}A} \\ \\ \displaystyle \sf \: \dfrac{ {( {sin}^{2}a + {cos}^{2}a) }^{2} }{ {cos}^{2}A. {sin}^{2} A} \\ \\ \displaystyle \sf \: \frac{ {(1)}^{2} }{ {cos}^{2} A + {sin}^{2} } \\ \\ \displaystyle \sf \frac{1}{ {cos}^{2} A} . \dfrac{1}{ {sin}^{2}A} \\ \\ \displaystyle \sf \: {sec}^{2}A. {cosec}^{2} A$

HENCE,

$\sf LHS \: = RHS$

Discussion

39.	1 or 90 ke beech kitna 7 hota h
Answer» ANSWER: 12 is the answer and its RIGHT

39.

1 or 90 ke beech kitna 7 hota h

Answer»

ANSWER:

12 is the answer and its RIGHT

Discussion

40.	HiThe angles of atriangle is 55 75 50What would be the sides of the triangle
Answer» ANSWER: ABC. .......... . ......

40.

HiThe angles of atriangle is 55 75 50What would be the sides of the triangle

Answer»

ANSWER:

ABC.

.......... . ......

Discussion

41.	Sinx+sin3x+sin5x+si7x
Answer» ANSWER: ANSWER sinx+sin3x+sin5x+sin7x sinx+7x+sin3x+sin5x [SIN(A+B)]sinC+sinD=2SIN 2 C+D COS 2 C−D Now, 2sin( 2 x+7x )cos( 2 x−7x )+2sin( 2 3x+5x )cos( 2 3x−5x ) 2sin4xcos3x+2sin4xcosx 2sin4x(cos3x+cosx) 2sin4x[2COS 2 C+D cos 2 C−D ] 2sin4x[2cos 2 3x+x cos 2 3x−x ] 2sin4x×2cos2xcosx 4sin4xcos2xcosx.

41.

Sinx+sin3x+sin5x+si7x

Answer»

ANSWER:

ANSWER

sinx+sin3x+sin5x+sin7x

sinx+7x+sin3x+sin5x

[SIN(A+B)]sinC+sinD=2SIN

2

C+D

COS

2

C−D

Now,

2sin(

2

x+7x

)cos(

2

x−7x

)+2sin(

2

3x+5x

)cos(

2

3x−5x

)

2sin4xcos3x+2sin4xcosx

2sin4x(cos3x+cosx)

2sin4x[2COS

2

C+D

cos

2

C−D

]

2sin4x[2cos

2

3x+x

cos

2

3x−x

]

2sin4x×2cos2xcosx

4sin4xcos2xcosx.

Discussion

42.	An overweight dog is put on a special diet. Use the table to determine the dog's average weight change per week. Show your work.
Answer» Answer: 2125 Step-by-step EXPLANATION: because the DOG is FAT

42.

An overweight dog is put on a special diet. Use the table to determine the dog's average weight change per week. Show your work.

Answer»

Answer:

2125

Step-by-step EXPLANATION:

because the DOG is FAT

Discussion

43.	-18+(-24) +(-9) +0+21+24+18
Answer» Answer: 12 hope this HELPS!

43.

-18+(-24) +(-9) +0+21+24+18

Answer»

Answer:

12

hope this HELPS!

Discussion

44.	Simplify √18 +√50simplify √2 +√32 +√512simplify √48 - √29
Answer» Answer: 8 $\sqrt{2}$ 21 $\sqrt{2}$ 4 $\sqrt{3}$ - $\sqrt{29}$ Step-by-step EXPLANATION:

44.

Simplify √18 +√50simplify √2 +√32 +√512simplify √48 - √29

Answer»

Answer:

8 $\sqrt{2}$

21 $\sqrt{2}$

4 $\sqrt{3}$ - $\sqrt{29}$

Step-by-step EXPLANATION:

Discussion

45.	If width and length of a rectangle is 58 and 174 what is the perimeter of rectange
Answer» Answer: 2 (58+174) =2×228 =456 pls MARK me the BRAINLIEST

45.

If width and length of a rectangle is 58 and 174 what is the perimeter of rectange

Answer»

Answer:

2 (58+174)

=2×228

=456

pls MARK me the BRAINLIEST

Discussion

46.	Identify diffrent types of number systems
Answer» Answer: Natural Numbers (N), (also called positive integers, counting numbers, or natural numbers); They are the numbers {1, 2, 3, 4, 5, …} WHOLE Numbers (W). ... Integers (Z). ... Rational numbers (Q). ... Real numbers (R), (also called measuring numbers or MEASUREMENT numbers).

46.

Identify diffrent types of number systems

Answer»

Answer:

Natural Numbers (N), (also called positive integers, counting numbers, or natural numbers); They are the numbers {1, 2, 3, 4, 5, …}
WHOLE Numbers (W). ...
Integers (Z). ...
Rational numbers (Q). ...
Real numbers (R), (also called measuring numbers or MEASUREMENT numbers).

Discussion

47.	Ratiof 65 paise to 5 rupees
Answer» Answer: 5 rupees = (5×100) PAISE = 500 paise Ratio = 65 : 500 = 13 : 100

47.

Ratiof 65 paise to 5 rupees

Answer»

Answer:

5 rupees = (5×100) PAISE = 500 paise

Ratio = 65 : 500 = 13 : 100

Discussion

48.	Number of computer June 300 july 450 August 600 September 550
Answer» ANSWER: what do you WANT to ask Step-by-step EXPLANATION: TELL

48.

Number of computer June 300 july 450 August 600 September 550

Answer»

ANSWER:

what do you WANT to ask

Step-by-step EXPLANATION:

TELL

Discussion

49.	Factorise x the power2+5x-24
Answer» x²+5x-24 x²+8x-3x-24=0 X(x+8)-3(x+8)=0 (x-3)(x+8)=0 x-3=0 or x+8=0 x=3 or x=(-8) Hope it HELPS you !

49.

Factorise x the power2+5x-24

Answer»

x²+5x-24

x²+8x-3x-24=0

X(x+8)-3(x+8)=0

(x-3)(x+8)=0

x-3=0 or x+8=0

x=3 or x=(-8)

Hope it HELPS you !

Discussion

50.	23,450 23,700 23,950 23,1200
Answer» ANSWER: bhai KARNA keya HEI YE ti BATA

50.

23,450 23,700 23,950 23,1200

Answer»

ANSWER:

bhai KARNA keya HEI YE ti BATA

Discussion

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