Lisa bought five cds from the store. the price of each cd was the same. after she bought the cds, her account balance showed a change of -$64.95. what would have been the change to lisa's account balance had she only bought one cd from the store?

$-12.99

Step-by-step explanation:

Lisa bought five CDs from the store at a same price.

After purchasing CDs her account balance showed a deduction of 64.95 = $-64.95

This means the price of 5 CDs = $64.95

The price of one CD =  

                                  = $12.99

If she only bought one CD from the store the change to Lisa's account balance showed $-12.99

step-by-step explanation:

the first 5 right here the next 5 i will upload as separate question

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6