If you averaged 400 miles per day, about how many days would a trip of 1990 miles take

At least 5 days

Step-by-step explanation:

400 miles per day  / 1990 miles trip would take?

Cross multiplying gives;

= 4.975 days

Rounding off the answer to nearest day gives 5 days.

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