Needs to be a 2 column proof in 9 steps. only number 4

$450

step-by-step explanation:

first, you have to multiply 150x2=300

next, you have to add 150+300= 450

b. hannah is playing with her cousin at

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