Question

Rachel fills 13 water bottles per hour. Alyssa fills 15 bottle of water per hour. This week Alyssa filled an additional 5 bottles of water. Write an expression that represents the weekly water of bottle filled. R=the number of hours that Rachel filled bottles this week. A=the number of hours Alyssa filled the bottles this week.

Answer 1

Rachel fills 13 water bottles per hour, so she contributes 13R.  Alyssa fills 15 bottles an hour, so she contributes 15A, plus 5 for the additional water bottles filled.  Thus, the full expression is:

13R+15A+5