If x and y are complementary angles, find the value of P if P= cos (540°-x) sin (540°- y) + cos (90°- x) sin (90°- y).

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

Steve had 48 chocolates but he decided to give 8 chocolats to each of his f coworkers. how many chocolates does steve have left

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?