If the cost, c, for manufacturing x units of a certain product is given by c=x^2-20x+30, find the number units manufactured at a cost of $10,955

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

What is the value of r of the geometric series?

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