The graph of a sinusoidal function intersects its midline at (-4pi,2.5) and then has a maximum point at (-5pi\2,6)

You are constructing a histogram for scores that range from 70 to 100 in whole points. frequencies range from 3 to 10; that is, every whole-point score between 60 and 100 occurs at least 3 times, and at least one score occurs 10 times. which of these would probably be the best range and size for the score intervals along the x-axis?

Find the value of the cosine for angle a

Solve: 3x+y=6 4x-2y=18 show all work !