Respuesta :

56 -----8
x-----3
x=56*3/8=21

it can be done also like this:
c=km
56=k*8
k=56/8=7

c=7m , so c= 7*3=21
EyeSpy
The ratio 56 to 8 can be written as a fraction:

56/8

This simplifies to 7. Because C varies directly with M, we can use the second value of M to write an equivalent algebraic expression.

c/3 = 7

Multiply both sides by 3:

c = 21

When M = 3, C = 21

I hope this helps!

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