06.01) saturday morning there were 7 adults and 20 kids at pump and jump land. the morning cash registers show $236 was collected. in the afternoon there were 21 adults and 50 kids for a total amount of $618. what is the cost for 1 adult?

The correct answer is $8

Step-by-step explanation:

I just scored the test

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

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