2/6 times 4/8 multiplying radicals

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

2x minus y equals 6, x plus y equals negative 3

Alcoa was $10.02 a share yesterday. today it is at $9.75 a share. if you own 50 shares, did ou have capital gain or loss ? how much of a gain or loss did you have ? express the capital gain/loss as a percent of the original price