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OpenStudy (icalibear):
The sales tax in one state is 7%. Write a function rule for finding the total cost of an item with selling price x. Then find the total cost of a CD player with a selling price of $150. Please help!!
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OpenStudy (pfenn1):
Total cost = (selling price x) plus (the tax rate times the selling price). Can you write the formula for that?
OpenStudy (icalibear):
Is it f(x) = 0.07x?
OpenStudy (pfenn1):
Close. The term (0.07x) accounts for how much sales tax you would pay. The total cost would be the price plus the sales tax.
OpenStudy (icalibear):
So how would I write that
OpenStudy (icalibear):
f(x) = 7 + x?
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