For u=(2,1), v=(3,-1) find 3u-v and the magnitude of 3u-v

One integer is 5 more than another. their product is 104. find the integers

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.

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?