A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 7% cement
should he mix with 4 bags of 17% cement to produce a mix containing 11% cement?

i dont know men

step-by-step explanation:

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

you need to add a picture