Which of the following expressions is equal to
-4x^2-36?
A. (-4x-9i)(x-4i)
B. (-4+12i)(x-3i)
C. (-4x+9i)(x-4i)
D. (-4x-12i)(x+3i)

we need more info to solve this

answer: 298143

step-by-step explanation:

these sign is used to tell weather the number is greater or less than the number   <   or >     but this sign means its equal =    

hope this you and

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