What is the first step in solving the equation 4.2y - 5.2 = 18.5?

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.