FIRST WILL BE MARKED BRAINLIEST! Sarah went on a car trip with her parents. If they traveled 150 miles before their first hour (30 minute)
break and another 300 miles before their second 7 hour (30 minute) break what was the average speed if
they got to their destination in 6 hours not including the 2 stops?

75 miles per hour

Step-by-step explanation:

they traveled 450 miles in 6 hours

450/6 = 75 mph

you forgot an image

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!