You choose a marble at random from a bag containing 12 red, 11 blue, 3 green, 12 yellow, and 22 black marbles. The marble is red. What is the probability of this event

Which is the most efficient first step to solve x in the equation 3.7x - 18 = -4.3x -34 a. add 3.7x to both sides of the equation. b. add 4.3x to both sides of the equation. c. subtract 18 from both sides of the equation. d. subtract 34 from both sides of the equation.

What is the product? (x2+3y+7) [yy+1)

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.