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.

a.

f(x) = x – 7; $148.93

c.

f(x) = 7 + x; $151.07

b.

f(x) = 0.07x; $10.50

d.

f(x) =1.07x; $160.50

Question

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.



a. 

f(x) = x – 7; $148.93 

c. 

f(x) = 7 + x; $151.07 


b. 

f(x) = 0.07x; $10.50 

d. 

f(x) =1.07x; $160.50

greatlife44 · Answer

The sales tax is 7% of the item

greatlife44 · Answer

$$y = price + tax$$

$$\frac{ 7 }{ 100 } = 0.07,$$

$$x = price $$

we would expect our price to increase by 1.07x 

$$y = 1.07(x)$$

is this clear?

jazzy123crowell · Answer

so what would the answer be then

greatlife44 · Answer

Look through how I set the problem up

anonymous · Answer

so it is D according to the problem she solve

anonymous · Answer

understand ?