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A= 1 2 2 A^T=1 2 a 2 1 -2 2 1 2 a 2 b 2 -2 bA*A^T=1+4+4 2+2-4 a+4+2b =9 0 0 2+2-4 4+1+4 2a+2-2b 0 9 0 a+4+2b 2a+2-2b a^2+4+b^2 0 0 9a+2b+4=02a-2b+2=0a+2b+4+2a-2b+2=03a+6=0so a=-2-2+2b+4=02b=-2b=-1

Let a be any positive integer and b = 3a = 3q + r, where q ≥ 0 and 0 ≤ r < 3Therefore, every number can be represented as these three forms. There are three cases.

Case 1: When a = 3q,Where m is an integer such that m = (3q)3 = 27q39(3q3) = 9m

Case 2: When a = 3q + 1,a3= (3q +1)3a3= 27q3+ 27q2+ 9q + 1a3= 9(3q3+ 3q2+ q) + 1a3= 9m + 1Where m is an integer such that m = (3q3+ 3q2+ q)

Case 3: When a = 3q + 2,a3= (3q +2)3a3= 27q3+ 54q2+ 36q + 8a3= 9(3q3+ 6q2+ 4q) + 8a3= 9m + 8

Where m is an integer such that m = (3q3+ 6q2+ 4q)Therefore, the cube of any positive integer is of the form 9m, 9m + 1, or 9m + 8.

During sunrise and sunset, the rays have to travel a larger part of the atmosphere because they are very close to thehorizon. Therefore,lightother than red is mostly scattered away. Most of thered light, which is the least scattered, enters oureyes. Hence, the sun and the sky appear red

Thanks sir

4.5 litres= 4500 cm (all units must be same)4500= 30X25X (Height) this is the formula for a cuboidMake height the subject of the formula so:4500/30x25=6

is also a square matrix

A-A' is also A square matrix

from cross multiplicationx^2=16×196x=√16×196x=4×14=56

56 is the correct answer of the given question

56 is the right answer

x/16 = 196/xx^2 = 16 × 196x = 4 × 14x = 56 is the answer of the given question

x=√196×16 x=14×4x=56Answer is 56

×=4×14=56 is a rahit an.

3/4*t=15t=15*4/3t=20

3÷4 ×t=15 .=3t÷4=15=3t=15×4=3t=60=t=60÷3=20

given,3/4*t= 15.t=15*4/3. (3*5= 15)t=5*4t=20

Three -fourth of t is 15= 20

plz answer this Jo Maine abhi post Kiya hai

3/4*t = 15so t = 15*4/3t = 20

answers is 3/( 4×3=12) (15-12=3 it's Wright answer

three forth of t is 15.Answer👇3/4 t =15

3/4*t=15t=15*4/3t=20

3/4 ×T = 15T= 15×4/3T=5×4T=20Answer

3/4 of (t) is 153/4×t=15t=15×4/3t=5×4value of(t

3/4 of (t) is 153/4×t=15t=15×4/3t=5×4value of(t) is 20 .

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Poramathi niti ki answer

3/4×t=15t=15÷3/4t=15×4/ 3t=5×4t=20

3/4*t= 15 t=15*4/3 t= 20

t=20is the right answer of this question

t=20 ie the correct answer

3/4 of t=15so, answer is =15👌

t=20 is the right answer of this question

3/4 of t is 15 then. 3/4*t=15= t=15*4/3=20 Ans

3/4xt=15 t=4/3x15t=60/3=20

t=20, 20,20,20,20,20,

T=20 us answer of this Question

3:-4xt=15=3t:-4=15=3t=15x4=3t=60=t=60:-3=20 answer

Answer is =(3/4+=14 3t/4=15

t=20 is the answer of the question

three-fourth of t is 15= 20

3/4 of t = 153/4×t = 15t = 15 × 4/3 (cancel 3 and 15.)t = 20

((15/4)*(3))=11.25 Ans

three-fourths of t is 15=20

3/4*t=15t=15 *4/3 (3*5=15) t=5*4t=20

20 is the right answer

= 20 answer na

3/4×t=153t=60t= 20it's very very short answer

The answer is 3/4t=15t=15×4/3t=5×4t=20

3/4*t=15.t=15*4/3.t=5*4.t=20.

t is equal to 20 of this question answer is 20 is right or wrong

20 is the answer of above question

t*3/4=153t=15*4=60t=60/3=20 ✔✔

20. .

there is 3t/4=15 then t=15×4/3 that's t=5×4=20

3/4*t = 15 so t = 15*4/3t = 20

Loss=28inrSP=532inrcp=(SP+LOSS)C.P=₹560Loss%=(loss/cp×100)=(28/560×100)%=5%loss

real answer Kya ho ga 28 ya 40

let the prices be

x,x-20,x-40,x-60,x-80,x-100,x-120

sum is 700

7x-420=700

7x=1120

x=160

prices are

160,140,120,100,80,60,40

The rank of a matrix is defined as (a) the maximum number of linearly independent column vectors in the matrix or (b) the maximum number of linearly independent row vectors in the matrix.

3×4-4×-2=2012+8=2020=20 is the correct answer of the given question

x=4 and y=-23x-4y=203×4-{4×(-2)}=2012-(-8)=2012+8=2020=20.*. (4,-2) are the roots of given eqation

3x - 4y = 20; (4, -2) = 3(4)-4(-2)=20; = 12 + 8 = 20; =20 = 20

correct answer is 20

Area of triangle = A = square root of [s(s-a)(s-b)(s-c) where 2s =a+b+c.

Each side is halved,

s’ = s/2

(s’-a’) = (s-a)/2.

(s’-b’) = (s-b)/2.

(s’-c’) = (s-c)/2.

New areaA’ = square root of [s(s-a)(s-b)(s-c) /16. = A/ 4.

Change in area = 3/4 A

= 75% decrease

still more clear

thank7

thanks sir

Yes that answer is correct

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let side of cube =xSurface area of remaining solid = total surface area of cube-curved surface area of hemisphere=6x²-2πr²=6x²-2×22/7×x/2×x/2=6x²-11/7x²=x²(6-11/7)=x²(6-1.57)=5.43x² (approx.)

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https://doubtnut.app.link/bsYl0bjVAX this link will lead to the video solution of this question

Let S be Swati's age and R be Ravi's age. S = R - 3 . . . . . (1) S + R = 33 . . . . . (2)These are the equations.To solve itSubstitute (1) in (2) => R - 3 + R = 33 2R = 30 R = 15 S = 12Ravi's age is 15 yearsSwati's age is 12 years

4/5+(-2/5)= 4/5-2/5= 2/5

page 1

Page 2

option 3 ) is the correct answer

You need to remember this concept to solve the question:Area of trapezium = 1/2 X (Sum of Parallel sides) X Distance between them.

Usingarea of trapezium= 1/2 × sum of parallelsides × heightgiven area of trap.= 105cmand height=7cmone side is loger 6 cm than otherlet the one side be xthen other be 6+xthen use formula

105=1/2(x+6+x)×7210/7=2x+630-6=2x24=2xx=12so first side is 12and other 12+6=18 cm

18 cm is the correct answer

option 2 is the correct answer

18 is the correct answer

4) is the correct answer

18 is the correct answer

the answer coùld be option 1

1 part of red pigment added with 8 parts of base.

Then,With 4 part of red pigment require 8*4 = 32 parts of base.

8 parts of base = 75 ml

Hence,1800 ml of base = 1800/75 = 24 parts

Therefore, 1800 ml or 24 parts of base require = 24/8 = 3 parts of red pigment.

i) 2x² + kx + 3 = 0

When roots are equal then discrimanat is 0

D = b² - 4ac

k² - 4 × 3 × 2 = 0

k² = 24

k = √24 = 2√6 or - 2√6

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Given outer length = 10 cmOuter breadth = 8 cmOuter height = 7 cmOuter volume = length × breadth × height= 10 × 8 × 7 = 560 cm3Thickness of wooden box, w = 1 cmInner length =l– 2w = 10 – 2 = 8 cmInner breadth =b– 2w = 8 – 2 = 6 cmInner height =h– 2w = 7 – 2 = 5 cmOuter volume = 8 × 6 × 5 = 240 c m3Volume of wood used = outer volume – inner volume= 560 – 240 = 320 cm3Given cost of 1 cm3of wood = Rs 2Hence the total cost of wood required = Rs 2 × 32= Rs 640

Let swati had x candiesCandies swati ate = x/2 Candies swati gave to Jeny = x/2 Jeny kept candies = 8 Candies Jeny gave to swati = x/2 - 8 ATQ x/2 - 8 = 10 x/2 = 10+8 = 18 x = 18*2 = 36 Candies swati ate = x/2 = 36/2 = 18

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21m² ÷ 7m

21m²-------- 7m

3m

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where is the solution

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