For a road trip a car of travelers can take the direct route or the scenic route. the scenic route takes 25% longer than the direct route. the group decides to take the direct route to their destination, and the scenic route on the return trip. if the total travel time to and from the destination is 12 hours, how long did the scenic route take?

1/4 and 8/3 because:

the reciprocal if 4 is 1/4 because 4 is used as 4/1 and the opposite of that is 1/4. the opposite of 3/8 is 8/3 so that is the answer.

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!

lol.

it's ok we all do this sometimes.

-aparri

it has to have an angle of 90 degrees