If u= 4,-2) and v=(3,1), determine –3u+3v

Edit: I forgot to take a pic

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?

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?