Video games sold: x revenue function: r(x) = 60x cost function: c(x) = 12 + 7x profit function: p(x) = what is the profit earned from selling 20 video games?

Profit P(x) = 53x-12 and On selling 20 video games profit will be 1048.

Step-by-step explanation:

In the given question functions are Revenue function : R(x) = 60x and Cost function : C(x) = 12+7x  for the sale of x video games

As we know profit = sale price - cost price

Therefore P(x) = R(x) - C(x)

Or P(x) = (R-C)x = 60x - (12+7x)

P(x) = 60x -12 - 7x

P(x) = 53x -12

Now the profit on selling 20 video games will be

P(20) = 53×20 -12 = 1060 -12 = 1048.

3x + 4y -25 =0 represents the amount of change sianna should recieve

just sum

10 + 10 = 20