63/5 + 4/7 me get the answer i dont get it

In the following situation, determine whether you are asked to determine the number of permutations or combinations. then do the calculation how many ways are there to pick a starting five from a basketball team of twelve members? a. permutation; ps - 2520 b. combination; 1c, - 792 c. combination: 2cs - 2520 d. permutation; ps - 95040

What is x and y intercepts for y=x+7

Find the maximum value of p= 4x + 5y subject to the following constraints :