Question

Greg bought three comic books on sale. The total cost of his purchase with 8% sales tax is given by the expression 3b + 0.08(3b), where b is the price of one book. If b = $3.50, how much did Greg pay all together? $7.02 $11.34 $13.02 $111.09

Answer 1

Answer:

The amount Greg paid all together is  $11.34.

Step-by-step explanation:

Here, the total cost expression is given as

C(b)  = 3b + 0.08(3b)

Now, given  b = $3.50.

Substituting the value of b in the cost expression,

So, the cost value = 3 ( $3.50)  + 0.08 (3) ($3.50)

                              = 10.5 + 0.84 =  10.78

or, C  = $11.34

Hence, the amount Greg paid all together is  $11.34.