Abag has five red marbles, six blue marbles, and four black marbles. what is the probability of picking a blue marble, replacing it, and then picking another blue marble?

a)1/15
b)8/75
c)4/25
d)1/9

The sum of the product of 4 and x and the product of 7 and y is 61. the sum of the product of 12 and x and the product of 21 and y is 61. what are the values of x and y?

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .

Acircle has a circumference of 28.36 units what is the diameter of the circle