Find the solution of this system of equations.
separate the x- and y-values with a comma.
x= 0 + y
3x + 12y= 15

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

If $740 is invested at an interest rate of 11% per year and is compounded continuously, how much will the investment be worth in 7 years? use the continuous compound interest formula a = pert.

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?