Aparticular sound wave can be graphed using the function y=-3 sin x. find the amplitude and period of the function.

Solve the equation below: (x+4)/6x=1/x a. x=2 b. x=0,2 c. x=-2 d. x=0,-2

What will the graph look like for a system of equations that has no solution? a. the lines will be perpendicular. b. the lines will cross at one point. c. both equations will form the same line. d. the lines will be parallel.

Can someone tell me if this is perpendicular? !