Solve the following system of equations algebraically for all values of a, b, and c. -3a - b - 3c = -8 -5a + 3b + 6c = -4 -6a - 4b + c = -20

Trish receives $450 on the first of each month. josh receives $450 on the last day of each month. both trish and josh will receive payments for next four years. at a discount rate of 9.5 percent, what is the difference in the present value of these two sets of payments?

The weekly revenue for a company is r = 3p^2 + 60p + 1060, where p is the price of the company's product. what price will result in a revenue of $1200.

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)