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 base of a triangle is 2 cm less than its height. If the area of this triangle is 40 cm2, find the lengths of its height and base.
- Find three consecutive odd integers such that the product of the first and the third is 41 more than four times the second integer.
- Karl paddles downstream in a canoe for 2 hours to reach a store for camp supplies. After getting what he needs, he paddles back upriver for 3 hours before he needs to take a break. If he still has 4 km to go and he can paddle at 6 km/h on still water, what speed is the river flowing at?