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Question 267779: computer sale: you have a coupon for $200 off the price of a personal computer. When you arrive at the store, you find that the computers are on sale for 20% off. Let x represent the original price of the computer.
question 28) form the composition of the functions f and g that represents your cost if you use the discount first, then use the coupon.
well I know f(x)=x-$200
g(x)=x-20%
but I don't know how to solve this problem
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! computer sale: you have a coupon for $200 off the price of a personal computer. When you arrive at the store, you find that the computers are on sale for 20% off. Let x represent the original price of the computer.
question 28) form the composition of the functions f and g that represents your cost if you use the discount first, then use the coupon.
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f(x) = 0.80x
g(x) = x-200
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gof(x) = g[f(x)} = g[0.80x] = 0.80x-200
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Cheers,
Stan H.
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well I know f(x)=x-$200
g(x)=x-20%
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