Directions: Solve the following problems. Circle your answers.

1. Sarah was the best runner in the eighth grade. One day she ran 100m in 40 seconds, 200m in 1 minute and 10 seconds, and 200m over low hurdles in one and a half minutes. How many more seconds did it take her to run the 200m over low hurdles then it did to run the 200m dash?

2. Solve for x.

8x - 13 + 1x = 32

3. Solve for n.

7n = 20 - 3n

4. Solve for x.

9x + 70 = 169