Word problem with multiplication and addition or subtraction of... Amy worked 28 hours last month and earned $8 per hour. She spent $15 of her earnings since then. How much money does she have left?

Will used 20 colored tiles to make a design in art class. 5/20 of his tiles were red. what is an equivalent fraction for the red tiles?

The table represents a linear function. what is the slope of the function? –6 –4 4 6

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?