Suppose a carpenter's ruler was marked in thirty seconds. What would be the fraction and its decimal equivalent for the mark on the ruler between 23 24
and
32?
The fraction is and the decimalis
(Simplify your answers.)
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12cm

the answer is d

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