Mr. McKenna filled his gas tank with 75 gallons of gas. It takes him gallon of gas to get to work. Each day, he travels to work and back home the same way. How many days can Mr. McKenna drive to and from work until his gas tank is empty?

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?

Solve the following inequalities and show the solution on a number line. 3/4 (2x-7) ≤ 5

Can someone tell me if this is perpendicular? !