In each of the following, supply the missing factor. (a) 2x^2+5x-12=(2x-3)( )
(b) 3x^2 -2x -1=(3x+1) ( )
(c) 4y^2 - 8y + 3 = (2y-1)( )
(d) 6t^2 - 7t - 3 = (3t+1)( )​

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?

Due to a packaging error, 4 cans labeled diet soda were accidentally filled with regular soda and placed in a 12 pack carton of diet soda. two cans were randomly selected from this 12 pack. what is the probability that both cans were regular soda?

Ateam of runners is needed to run a 1 2 -mile relay race. if each runner must run 1 4 mile, how many runners will be needed?