Erick wants to buy a new mountain bike that cost $250. He already saved $120 and plans to save $20 each week from the money he earns for morning lawns. He thinks he will save enough money after seven weeks.

He will have enough money.

Step-by-step explanation:

$250-$120=$130, $20x7 weeks =$140,$120+$140=$260

Erick would have saved enough money after 6.5 weeks (or 7 depending on your answer choices

Step-by-step explanation: You would begin by subtracting $120 by $250 to figure out how much money he needs to save. Your answer would have been that he needs to save $130. Then, you would divide it by the $20 he would save every week. That is how you would get 6.5 weeks. You could then round the number to 7 weeks.

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!