6. Jenna spent $18.00 of the $20.00 her mother gave her. Which decimal represents the fraction of the $20.00 Jenna spent?
A.0.09
B.0.90
C.0.18
D.0.10

B. 0.90

Step-by-step explanation:

If you do 18 divided by 20, you get 0.90

a

explanation:

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15