The sales tax in one state is 6%. 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 $160.

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mitch68200 mitch68200 · Answer 1 · 2017-06-23T17:07:56+02:00

if y= the item after tax
y=x+(x*6%) or y=x+6%
and then for the answer you would go:
y=160+6% or 160+(160*6%)= $169.60

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facundo3141592 facundo3141592 · Answer 2 · 2022-05-26T11:25:09+02:00

The function for the total cost is c(x) = 1.06*x, and the cost of the CD is $169.60.

We know that we have a tax of the 6%.

Then if the cost of an item is x, the total cost (adding the tax) is:

c(x) = x + x*(6%/100%) = x*(1 + 0.06) = 1.06*x

Now that we have found the function for the total cost, we want to find the total cost of the CD with a selling price of $160.

To do it, we only use x = $160, then we get:

c($160) = 1.06*$160 = $169.60

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