20. If f(x) = 2x - 4 and g(x) = 3x + 1 find (f-g)(x)

21. If f(x) = 3x-1 and g(x) = x + 1 find (f-g)(x)

22. If f(x) = x/2 - 4 and g(x) = 3x^2 + x - 1 find (f+g) (x)

23. If h(x) = -7x + 1 find h(2)

if you’d show the work that’d be nice!!