PLEASE HELP!!
Questions and directions are in image!

The triangles are similar. what is the value of x? enter your answer in the box. x = two right triangles. the larger right triangle is labeled x on the longer leg, 12 on the shorter leg and 20 on the hypotenuse. the smaller triangle is labeled 4 on the longer leg, 3 on the shorter leg, and 5 on the hypotenuse.

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Is the point (0, 8) on the x-axis or y-axis? how do you know?