For problems 1–4, perform the indicated operations and simplify.
Reduce the expressions in questions 5–7.
Solve for .
For problems 9–12, find the solution set by any convenient method.
- The length of a rectangle is 3 m longer than its width. If it has a perimeter that is 46 m long, then find the length and width of this rectangle.
- Find three consecutive even integers such that the product of the first two is 16 more than the third.
- A boat cruises upriver for 4 hours and returns to its starting point in 2 hours. If the speed of the river is 5 km/h, find the speed of this boat in still water.