Question

a pair of shoes cost $30.99 and the sales tax is 5%. Use the formula C=p+rp to find the total cost of the shoes, C is the total cost, p is the price, and r is the sales tax rate.

Answer 1

The given formula is

`C=p+rp`

From the given information

`\begin{gathered} P=30.99 \\ r=(5)/(100)=0.05 \end{gathered}`

Substitute these values into the equation:

`C=30.99+0.05*30.99`

Solve the equation for c

`\begin{gathered} C=30.99+1.5495 \\ C=32.54 \end{gathered}`

Therefore, the total cost is:

`\text{ \$}32.54`