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3 years ago

Solve the system {3x-y=4 -9x+3y=-12

1 answer:

8 0

Hello :
3x-y=4 .....(1)
-9x+3y=-12 ....(2)
by (1) : y = 3x-4
in (1) : -9x +3(3x-4) = -12
-12=-12
infinity solution : ( x , 3x-4) x in R

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Find the volume of each ball. use the formula. where v is the volume and r is the radius. record the volume in table A of your s

pochemuha

Answer:

The volume of tennis ball = 38.808 $cm^{3}$ .

Volume of golf ball = 33.523 $cm^{3}$ .

Step-by-step explanation:

Given: The radius of the tennis ball is 2.1cm and the radius of thr golf ball is 2.0cm. the formula is V=4πr(to the 3rd power) /3 .

To find: Volume of tennis ball and golf ball .

Formula used: Volume = $\frac{4 π r^{3} }{3}$ .

pi(π) = $\frac{22}{7}$ .

Explanation : We are given that

Radius of the tennis ball = 2.1 cm

radius of the golf ball =2.0 cm.

We need to find the volume of each ball

So , plugging the given values of radius in above formula

Volume of the tennis = $\frac{4*22(2.1)^{3} }{3*7}$

On simplification we get, volume of tennis ball = 38.808 $cm^{3}$

Volume of the golf ball= $\frac{4*22(2.0)^{3} }{3*7}$

On simplification we get, volume of golf ball = 33.523 $cm^{3}$

Therefore , The volume of tennis ball = 38.808 $cm^{3}$ .

Volume of golf ball = 33.523 $cm^{3}$ .

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We are given pattern 615,605,595.

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3 years ago

Solve by the substitution method y=3x-12 2x-3y=-13

Neporo4naja [7]

y=3x-12
2x-3y=-13
substitute y=3x-12 into 2x-3y=-13

2x-3y=-13
2x-3(3x-12)=-13
2x - 9x + 36 = -13
-7x = -49
x = 7

y=3x-12 = y=3(7) -12 = 21 - 12 = 9

answer
solution
x = 7 and y = 9

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