Question

The expression 0.09x+(x−30) models the final price of a bicycle with an instant rebate in a state that charges a sales tax. Enter the amount of money of the instant rebate in the box.

Answer 1

I believe that the amount of the instant rebate is $30. X represents the price of the bike, 0.09 is the sales tax.

So if the bike cost $100:
0.09(100) + (100-30) = 9 + 70 = $79

Although I think I would want them to tax the bike after the instant rebate and not on the original price.


If I'm wrong about the instant rebate then it would be 1.09x-30. Hope this helps.

Answer 2

The amount of money of the instant rebate is 30.

Explanation:

The given expression is

`0.09x+(x-30)`

This model represents the final price of a bicycle with an instant rebate in a state that charges a sales tax.

Find the initial value of the expression.

Put x=0 in the given expression.

`0.09(0)+(0-30)`

`-30`

At the initial stage the price of a bicycle is -30. It means 30 is the amount of rebate.