Elena is feeding her neighbor’s dogs. Each dog gets 2/3 of a cup of dog food, and she uses 3 1/3 cups of food. How many dogs does her neighbor have? (Just type the number of the answer.)

4+4+2x

or

2x+8

step-by-step explanation:

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