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Sophie [7]
2 years ago
6

Two solid metal spheres have masses of 5 kg and 135 kg respectively. If the radius of the smaller one is 4 cm, find the radius o

f the larger one.​
Mathematics
1 answer:
Cerrena [4.2K]2 years ago
8 0

Answer: 12 cm

Step-by-step explanation:

The masses of the spheres are proportional to their volums, and the cube of the ratio is k^3=135/5=27 ==> k=3

The greater radius is 3*4=12 (cm)

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Answer:

Step-by-step explanation:

Eq. 1 )   −5x−3y−9=0

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there are two routes to solve this,   Substitution or  elimination,  I'll go for the 2nd one because I can see that the y values are a multiple of each other :)

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subtract Eq. 2 from Eq. 3  :)

-30x -18y =54

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then:

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now plug that into Eq. 2

4( - 9/5 + (-3/5)y ) - 18y = 54

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then plug in for either equation

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now we have the full answer

check it by plugging in both x and y into the 2nd equation

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this seems good  

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