What is - 5/6 divided by 9/10?

- 27/25
- 4/3
- 25/27
- 3/4

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?

Solve 13 + w/7= -18 (w/7 is a fraction)