Jessica has a bicycle that needs air in its tires. The air pump in her garage has a short hose. For everything to work right, the tire valves on the bicycle tires have to be at their lowest point.

Before rolling the bicycle toward the pump, the tire valves are at their lowest point. The circumference of the front wheel is 10.6 inches, and the circumference of the back wheel is 10.9 inches. By rolling the bicycle forward toward the air pump, how many revolutions are needed by the front wheel so that the tire valves are at their lowest point again?

What are the sotions to the quadratic equation 9x^2=4

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

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?