Question

the revenue R from selling x units of a certain product is given by R=x(20-0.2x)
How many units must be sold to produce a revenue of $500?

Answer 1

You will need to solve for x in the following equation:

500 = x(20-0.2x)

Answer 2

factor it out
500 = 20x -0.2x^2
0.2x^2 - 20x + 500 = 0
divide the whole equation by 0.2
x^2 - 100x + 2500 = 0
(x-50)^2
R=50

Answer 3

i got 500=20x-0.2x^2

whats the next step?
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