Find −523−16. Write your answer as a mixed number in simplest form.

The sum of two numbers is 12 and their difference is 18 what are the two numbers

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?

Which graph shows the solution to the system of linear inequalities? y-4t< 4 y