Jessica decides to mix grades of gasoline in her truck. she puts in 7 gallons of regular and 6 gallons of premium for a total cost of $28.96. if premium gasoline costs $0.19 more per gallon than regular, what was the price of each grade of gasoline?

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2

Over the course of the school year, you keep track of how much snow falls on a given day and whether it was a snow day. your data indicates that of twenty-one days with less than three inches of snow, five were snow days, while of the eight days with more than three inches of snow, six were snow days. if all you know about a day is that it is snowing, what is the probability that it will be a snow day?

Asequence is a function whose is the set of natural numbers