For problems 1–4, perform the indicated operations and simplify.
Reduce the expressions in questions 5–7.
Find the solution set.
For problems 9–12, find the solution set by any convenient method.
- The width of a rectangle is 5 m less than its length, and its area is 20 more units than its perimeter. What are the dimensions of this rectangle?
- Find three consecutive odd integers such that the product of the first and the third is 35 more than ten times the second integer.
- Wendy paddles downstream in a canoe for 3 hours to reach a store for camp supplies. After getting what she needs, she paddles back upstream for 4 hours before she needs to take a break. If she still has 9 km to go and she can paddle at 5 km/h on still water, what speed is the river flowing at?