The amount of money spent at the gas station varies directly with the number of gallons
purchased. When 12.5 gallons of gas were
purchased, the cost was $34.25. Whats the
equation that represents this situation?

Use set builder notation to represent the following set: { -3, -2, -1, 0}

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

The probability that a student graduating from suburban state university has student loans to pay off after graduation is .60. if two students are randomly selected from this university, what is the probability that neither of them has student loans to pay off after graduation?