10
QuizMultiple Choice
Unit Test — Unit test
Question 10 • LHS Algebra I
Working together, Rocco and Giulia can paint a room in 3 hours. It would have taken Rocco 7 hours to do the job alone. Which equation can be used to determine r, Giulia’s rate of work in parts per hour?
Answer
A
+ 3r = 7
B
+ 3r = 1C
= r
D
= 3r