An item is regularly priced at $ 60 . Ivan bought it at a discount of 70 % off the regular price. How much did Ivan pay?

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z