This is a diagram of a swimming pool. The dotted circle represents floating buoys. The pool has a diameter of 10
meters. The shortest distance from the buoys to the edge of
the pool is:
a. 1 m
b. 2 m
c. 3 m
d. 4 m

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

the equation is going to be