To prove that 2/3root5 is irrational

Given f(x)=2x^2-8x+6 and g(x)=3x-1 find f(x) +g(x) a. 2x^2+5x+5 b.2x^2-11x+7 c. 2x^2-5x+5 d.2x^2-5x-5

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.

The functions f(x) and g(x) are shown in the graph f(x)=x^2 what is g(x) ?