How do you find the point of intersection of the two lines ?

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

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

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with