Gabe's father gave him $10 to go buy groceries. He picked up a gallon of milk for $3.79, three pounds of oranges that cost $1.14 per pound, and a box of cereal for $2.40. Gabe used front-end estimation to determine whether he had enough money for the groceries. How much did he estimate the total cost to be?

$9.61

Step-by-step explanation:

Step one:

Total amount given= $10

A gallon of milk for $3.79

Three pounds of oranges that cost $1.14 per pound

=3*1.14=$3.42

A box of cereal for $2.40

Step two:

The estimated cost for all the items

=3.79+3.42+2.40

=$9.61

He estimated the cost to be $9.61

And yes he has enough money to buy the groceries

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!