Plot five parabolas with the same X intercepts (black), But different vertices (other colors)

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

In a 45-45-90 right triangle, what is the ratio of the length of one leg to the length of the other leg? а . 1: 2 в. 2: 1 с. 2: 1 d. 1: 1

X+y=-4 x-y=2 use elimination with adding and subtraction