20x + 35y. what is the greatest common factor of the terms 20x and 35y?

For the equations below which statement is true ?

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

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers