Can someone help me with this the answers are at the bottom

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

Find the solution of this system of equation -7x+y=-20 9x-3y=36

For the chance to be team captain, the numbers 1-30 are put in a hat and you get two chances to pick a number, without replacement. which formula correctly shows how to find the probability that you choose the number 1 and then 2?