Create a unique short story situation that involves this equation.
40.25r - 7 = 100 - 12r

Which of the following expressions is equal to 2x^2+8

Solve x+3y=6 and 4x-6y=6 by elimination . show work !

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?