Find a number that is 30 less than it's square

Aportion of a hiking trail slopes downward at about an 84° angle. to the nearest tenth of a flot, what is the value of x, the distance the hiker traveled along the path, if he has traveled a horizontal distance of 120 feet? a. 143.3 b. 12.5 c. 120.7 d. 130.2

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?

Atriangle has side lengths of x, x+11, and 3x+5. what is the perimeter?