OK so we know that the other side is 12 because the right triangle has to have two sides that add up to the hypotenuse, and I believe it gives you the answer in the question because you are trying to find x which it says x is the angle, and since its a right triangle, it would be 90°
Multiply 12 and 3 and you will get four. four is like 1 over 4: 1/4
Replace x with 10 and simplify the fraction.
40/10 = 4/1 = 4
The answer is 4
Y=5/2x+5 because the slope is 5/2 and the y-intercept is 5