Amy S.

asked • 09/09/16

Please help, thanks!

If A is directly proportional to C and B is directly proportional to C, prove that each of the following is directly proportional to C. 
 
a) A+B
b) A–B
c)√AB

1 Expert Answer

By:

Arturo O. answered • 09/09/16

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Amy S.

So as long as the constants have a and b, all of them are directly proportional to C?
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09/09/16

Arturo O.

As long as each of the 3 expressions can be found to be equal to a (constant)*C, they are proportional to C, since that is the definition of proportionality:
 
y is proportional to x if y=kx, with k = constant 
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09/09/16

Amy S.

Alright, thanks!
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09/09/16

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