Which of the following relations is a function? A. (1, 1), (-3, 4), (-5, 1), (1, -5) B. (-5, 4), (-3, 6), (-5, 3), (8, 2) C. (-5, 1), (-3, 4), (1, -5), (-3, 6) D. (-5, 1), (-3, -5), (1, 5), (8, 1)

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?