Solve |x| > 4

a: {-4, 4}
b: {x|-4 < x < 4}
c: {x|x < -4 or x > 4}

If a and b are the measures of two first quadrant angles and sin a = 4/9 and sin b = 2/5 find sin(a+b).

Find the slope of the line passing through a pair of points

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.