Tony walked 3 miles per hour for half an hour how far did he walk you walk?

How do i do this activity, is appreciated

Lindsay used two points, (x,y; ) and (+2.82), to find the equation of the line, y = mx + b, that passes through the points. y2-y, first, she used the definition of slope and determined that the value of mis x, - . given this information, which expression must represent the value of b?

Sketch one cycle if the cosine function y=2cos2theta