How do I complete this formal check?

The lengths of two sides of a right triangle are given. find the length of the third side. round to the nearest tenth if necessary. a) y = 12/5x + 39/5 b) y = 5/12x + 5/39 c) y = 12/5x - 39/5 d) y = 5/12x - 5/39

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?

In the diagram of circle o, what is the measure of zabc?