Suppose a car uses 30 gallons of gasoline for a trip of 500 miles. how many gallons would be used on a trip of 300 miles?

answer:

your answer is: c. 196 7/8 in^3.

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb