-2.4,9.8,22,34.2... is this arithmetic

If f(x) = 2x + 2 and g(x) = x? , what is (gºf)(2)?

What is the sum of these mixed numbers 4 2/3+ 3 1/9

What are the interpretations of the line 3x - 15y = 60? x-intercept y-interception a: x 20 - y -4 b: x 5 - y 20 c: x -3 - y 15 d: x -4 - y 20