(cos^3 )A. cos 3A +( sin^3 A). sin 3A = (cos ^3) 2A

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

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?

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers