Alisa bought 3 shirts for $29 each and then spent $15 on lunch. She has $31 left. How much money did she have before?

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

Tom can paint the fence in 12 hours, but if he works together with a friend they can finish the job in 8 hours. how long would it take for his friend to paint this fence alone?

Which shows one way to determine the facts of x3+4x2+5x+20 by grouping