At the beginning of the year, Shelby could run 2 miles. Now
she can run 3.5 miles. What is
the percent increase in the
distance she can run?

do i do it on a graph?

step-by-step explanation:

i can't read the graph

step-by-step 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