It takes 30 minutes or less to walk from home to school and back home again when walking at 30 m/min to school and walking at 45 m/min from school. What is the distance from school. (Please explain how you got the answer, that will help a lot! Thanks)

answer for #1 is c

answer for #2 is d

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14

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