20. Determine whether the function below is even, odd, or neither. Prove your answer algebraically. 21. Which statement about the function belo is true? f(x)=5-x2 f(x)=-2x+8x even odd neither 22. Given the functions below, find (g-f)(x) and give its domain. f(x) = x + 2x -7x-1; g(x) = x-x + 4x A. It is odd and symmetric to the origin. B. Odd and symmetric to the y-axis. C. Even and symmetric to the origin. D. Even and symmetric to the y-axis. 23. Given the functions below, find (f + g)(x) and give its domain. 2 f(x) = x 5; 8(x) = -- x+5' x (g- f)(x) = Domain: (f +g)(x) = Domain: 24. Given the functions below, find (f.g)(x) and give its domain. 25. Given the functions below, find give its domain. g (*)(*) (x) and f(x)=x-7; g(x)=x-2 (fg)(x) = Domain: f(x) = x-8x+15; g(x)=x (x) = Domain: Gina Wilson (All Things Algebra, LLC), 2017