The steps shown below were used to find an expression equivalent to 2/3(3x– 12y) + 2x. Step 1: ?
Step 2: 4x - 8y
Step 3: 4(x-2y)
Which expression could be used as Step 1?

(A) 2/3(6x - 12y)

(B) 2x -8y + 2x

(C) 2x - 12y + 2x

(D) 3(x - 2y) + 2x

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

Which expressions are equivalent to k/2 choose 2 answers: a k-2 b 2/k c 1/2k d k/2 e k+k

Suppose i pick a jelly bean at random from a box containing one red and eleven blue ones. i record the color and put the jelly bean back in the box. if i do this three times, what is the probability of getting a blue jelly bean each time? (round your answer to three decimal places.)