Zoom in to see but is it a b c or d plzzz help

Sketch one cycle if the cosine function y=2cos2theta

Which statements about the system are true? check all that apply. y =1/3 x – 4 3y – x = –7 the system has one solution. the system consists of parallel lines. both lines have the same slope. both lines have the same y–intercept. the equations represent the same line. the lines intersect.

Astudent showed the steps below while solving the inequality |x-4|< 1 by graphing.