Whats a residual value? I missed the day we went over it and I don’t understand how to do this.

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

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

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0