Which expression would represent the cost of one CD, if the total cost for three of them is $36? 36-3
3(36)
36/3
3 + 36

Given that:

Total cost for three CD = $36

Number of CD = 3

To find:

The expression that will represent the cost of one CD.

Solution:

We know that formula, to find the cost of each unit.

Using this formula, we get

The required expression for cost of one CD is .

Therefore, the correct option is C.

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2