Equations & inequalities word problems Luke and Owen have $100 each. Their friend offered to invest their money, promising to return a sum r times as great as what hey invested. Luke was suspicious, so he invested $10 only, but Owen invested his entire $100. Fortunately, the friend did indeed return a sum r times as great to each. They decided to make another investment. This time, Owen invested all of the money returned to him, and Luke invested the money returned to him and the remaining $90. Again, they got a sum r times as great as what they invested. In the end, Owen had $337.50 more than Luke. Write an equation in terms of r that models the situation.

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Question: a) does the given set of points represent a linear function? how do you know? b) assume that the point (-2,4) lies on the graph of a line. what y-values could complete this set of ordered pairs that lie on the same line: (- (hint: there are several correct answ

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?