All computers are on sale for 10% off the original price. If x is the original price of the computer, then the function that represents the price after only a 10% discount is:

P(x) = x - 0.1x

P(x) = 0.9x

The function that gives the price, C, if only a $150 coupon is used is:

C(x) = x - 150

Choose the composition function that gives the final sale price after a 10% discount is followed by a $150 coupon.