Sean is training for a race. The equation f(x) = 5(x + 1) + 2x represents the number of miles Sean runs during any given training week (x). What is f(3)?

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?