For each ordered pair determine whether it is a solution to the system of equations
-2×+7y=3
5×-3y=7

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?

Find the distance between the point (-3,-4), and (see the picture below)

Apack of gum would be considered a(n) necessity luxury item small ticket item unaccountable expense