Abag has 7 red marbles, 8 blue marbles, and 5 purple marbles. rachel draws a marble from the bag without looking. what is the probability that rachel draws a blue marble?

Which of the following expressions is equal to 2x^2+8

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)

Suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12 y=7 when x=3