One rectangle is 10 inches and 35 inches the second rectangle is 6inches and x what is x

We just started the introduction into circles and i have no idea how to do this.

Ineed with angles and the measure of them i have abc a is 65 and b is (3x-10) and c is (2x) find the value of x

The number of calories you burn depends on your weight. a 110-pound person burns 163 calories during 30 minutes of tennis. find the number of calories that a 190-pound person would burn during the same activity, assuming they burn calories at the same rate.