Question

Solution:

Roy buys a coat for $86.40, which includes an 8% sales
tax. Which equation could you use to find the cost of
the coat, c, without the sales tax? Select all that apply.
A
0.92 X 86.40 = C
C
0.92c = 86.40
B
C +0.08C = 86.40
D
1.08C = 86.40​

Answer 1

B) The equation that can be used to find the cost of the given coat

is C + 0.08 C = 86.40

Explanation:

The selling price of the coat = $ 86.40

The percentage of sales tax= 8 %

Let us assume the cost price of the coat = C

Now, the tax is calculated on the cost price.

So, 8 % of C =
`(8)/(100)  * C = 0.08 C`

⇒ The tax on the cost price C = 0.08 C

Selling Price = COST PRICE + Tax Amount

or, $86. 40 = C + 0.08 C

⇒ C + 0.08 C = 86.40

Hence, the equation that can be used to find the cost of the given coat

is C + 0.08 C = 86.40