I failed the meth test now the police are coming

What is sin 7x/4 ? i need on this urgent trig

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3

If you answer 2+2 you will get over 80 points