What is the area of the regular trapezoid below?

Use the matrix-column representation of the product to write each column of ab as a linear combination of the columns of a.

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.