SOLUTION: 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

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: 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       Log On


   

Question 982166: 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.

f(x) = 7 + x; $151.07
f(x) =1.07x; $160.50
f(x) = 0.07x; $10.50
f(x) = x – 7; $148.93



Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

The sales tax in one state is 7% or 0.07.
if selling price x, then tax will be 0.07x
then to find the total cost of a CD player with a selling price of $x=150 you need to add the tax which is 0.07%2A150=10.50 and you have the total cost of a CD player
a function rule for finding the total cost will be
f%28x%29+=1%2Ax%2B.07x
f%28x%29+=1.07x
then you have
f%28x%29+=1.07%2A150
f%28x%29+=160.50
so, your answer is f%28x%29+=1.07x; $160.50+