Two jet planes simultaneously started travelling in opposite directions from the same airport. four hours later they were 3800 miles apart. if one plane traveled 80 miles per hour faster than the other, what was the speed of each plane?

the answer to this question is in the pic

how am i supposed to answer

step-by-step explanation:

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3