Question

Samuel and Joyce both bought CDs. Samuel bought 3x CDs and Joyce bought 2x-1 CDs. If each CD had a regular price of $18 and a discount of $2, then which expression would show the amount of discount for all of their CDs? (prerequisite skill) A. 5x – 1 B. 2(4x) C . 2(5x – 1) D. 16(6x)

Answer 1

Answer:

Option C . 2(5x – 1)

Step-by-step explanation:

we know that

The total number of CDs is equal to the CDs bought by Samuel plus the CDs bought by Joyce.

so

$3x+(2x-1)=5x-1$ ----> expression A

To find out the amount of discount for all of their CDs, multiply the total number of CDs by $2

so

Multiply the expression A by $2

$2(5x-1)$