Answer i need it ! will give brainliest and 50 ! campers were walking with a speed of 4.5 mph on the way to their rest area and were coming back to the camp with the speed of 4 mph, thus spending 15 more minutes to cover the distance. what was the distance between the camp and the rest area?

The rest stop is 9 miles away from the camp

Step-by-step explanation:

4.5 to

4 back

let x=time

4.5x=4(x+15)

4.5x=4x+60

.5x=60

x=120 minutes=2 hours

2 *4.5=9miles

2.25 hours (2 hours 15 min) * 4= 9miles

The rest stop is 9 miles away from the camp

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!