Kim had some candy to give to her four children she fist took two pieces for herself and then evenly divided the rest among her children. each child received four pieces. with how many pieces did she start?

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Answer for 10 points show work you guys in advanced < 3

Simplify this expression. 8x 16(x + y)