Answer:
Step-by-step explanation:
So you got (4x-15) and x
We know it will equal 180 total so you will do
(4x-15)+x=180
Add 15 to each side
4x+x=195
5x=195
Divide each side by 5
x=39
So if X equals 39, your only possible answer is A
Answer:
constant of variation
Step-by-step explanation:
Constant of variation and constant of proportionality mean the same and they are used in variations.
For instance:

In the above equation, y varies directly as x and the constant of proportionality or variation is 2.
<em>It is often represented with k (though, other alphabets can also be used)</em>
Its how much $$ they made minus the money they spent. The difference, or sum, is their profit