Write an equation in point slope form for the line that passes through the given point and the given slope (-2, -7) , m=45

y + 7 = 45(x + 2).

Step-by-step explanation:

y - y1 = m(x - x1)

Here m = 45 and (x1, y1) = (-2, -7) so we have:

y - (-7) = 45(x - (-2))

y + 7 = 45(x + 2).

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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