write an expression that models the sum of your earnings for three weeks and Rich's earnings for two weeks if you each work (r) hours per week and Rich receives $15 in tips per week. Simplify the expression.

Answer 1

Assuming the rate (dollars/hr) is the same,
tips for 2 wks + Rich earnings + my earnings.
(2wksx15/wk) + (r hrs/wk x 2wks) + (r hrs/wk x 3 wks) =
30 + 2r + 3r = 30 + 5r
Check my thinking.