Mark is driving to Texas to see his friend. He must travel 480 miles to reach his destination. On the first day he travels 265 miles. Mark says he can use the equation m – 265 = 480. Describe and correct Mark’s mistake. (Note: your equation should end in = 480).

she drove 134 miles

step-by-step explanation:

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!

i believe b is the answer