Find 2a(3 - b) if a = 4 and b = 5. show all work for full credit.

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial

I'm confused on this could anyone me and show me what i need to do to solve it.

Roy has 4 1/2 pizzas for the soccer team to split after the game. if each member is going to get 1/2 of a pizza, how many players are on the soccer team