Haley and Greg sold popcorn as a school fundraiser in front a popular local store for 3 hours. Haley sold 15 boxes of popcorn and Greg sold 9. Each box of popcorn is $2. Which expression best represents about how much they sold together every hour?

The correct answer is for three hours they sold $ 2 (x+l); $ 2 (y+m); $ 2 (z+n) where x + y + z = 15 and l + m + n = 9.

Step-by-step explanation:

Haley had 15 boxes and Greg had 9 boxes of popcorn ready to be sold.

Price of each box is $2.

Let Haley sell x, y, z boxes per hour for 3 hours and Grey sell l, m, n boxes hourly.

Given x + y + z = 15 and l + m + n = 9.

Amount worth sold by Haley in 1st hour is $2x.

Amount worth sold by Greg in 1st hour is $2l.

Amount sold in the 1st hour together is $ 2 (x+l).

Amount worth sold by Haley in 2nd hour is $2y.

Amount worth sold by Greg in 2nd hour is $2m.

Amount sold in the 2nd hour together is $ 2 (y+m).

Amount worth sold by Haley in 3rd hour is $2z.

Amount worth sold by Haley in 3rd hour is $2n.

Amount sold in the 3rd hour together is $ 2 (z+n).

Therefore amount earned hourly by selling popcorn together are $ 2 (x+l); $ 2 (y+m); $ 2 (z+n).