Annabel is comparing the distances that two electric cars can travelafter the battery is fully charged

What is sin 7x/4 ? i need on this urgent trig

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?

Factor the gcf out of the polynomial 9x^6+6x^4+15x^3