The sale price of every item in a store is 80% of its usual price. A: The usual price of a backpack is $30, what is its sale price?

B: The usual price of a sweatshirt is $18, what is its sale price?

C: The usual price of a soccer ball is $24.80, what is its sale price?

The variable in a relation who’s value depends on the value of the independent variable is called what?

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

Jessica is organizing a guided tour of the rain forest. the average profit per person that the touring company makes is given by the rational expression 18x+35/x, where x is the number of people going on the tour. what does the numerator of this rational expression represents?