Annie tried to solve an equation step by step. 7.5 + k = 10 7.5 + k − 7.5 = 10 − 7.5 Step 1 k = 2.5 Step 2 7.5+k 7.5+k−7.5 k =10 =10−7.5 =2.5 Step 1 Step 2 Find Annie's mistake.

Ateacher noticed 5/8 of the students were wearing either blue shorts or white shorts. write two different ways this could be done.

What can each term of the equation be multiplied by to eliminate the fractions before solving? x – + 2x = + x 2 6 10 12

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.