Dan has 20 books in his library. he bought several books at a yard sale over the weekend. he now has 71 books in his library. how many books did he buy at the yard sale?

In which of the situations can information about tyler be represented by the expression r+3 when r represents information about ray? check all that apply.

Each of the four sides of a swimming pool measures 9 meters. the pool is 5 meters deep. how much water will be needed to fill it completely? a. 45 cubic meters b. 81 cubic meters c. 225 cubic meters d. 405 cubic meters reset next

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.