2. Solve the following set of equations:
3. Expand and simplify:
4. An automobile goes 80 miles and back in 9 hours. The rate of speed returning was 4 miles per hour faster than the rate going. Find the rate each way.
5. Simplify:
6. Solve for x:
2. Solve the following set of equations:
3. Expand and simplify:
4. An automobile goes 80 miles and back in 9 hours. The rate of speed returning was 4 miles per hour faster than the rate going. Find the rate each way.
5. Simplify:
6. Solve for x: