Can some one please help me please

1. are the triangles similar and if so why? what is the value of x? show your work.

The sum of two numbers is 86, and their difference is 20. find the two numbers

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