Keshawn left his house at time zero and drove for 4 minutes to the store, at a speed of 1 blocks per minute. Then he stopped and went into the store for 2 minutes. From there, he drove in the same direction at a speed of 4 blocks per minute until he got to the bank, which is 16 blocks away from the store. He stopped at the bank for 6 minutes. Then he drove home at a speed of 10 blocks every minute. Make a graph of showing the number of blocks away from home that Keshawn is xx minutes after he leaves his house, until he gets back home.

Start from (19,8), take 2 minutes to travel 8 blocks back, end at (21,0).

Step-by-step explanation:

a) justify

step-by-step explanation:

justifying is just part of everyday life. justify kind of means proof so i think the answer is a) justify.

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!