Additional questions for assignment due Tuesday 12-22

Using your calculator's "intersect" option, find the solution(s) to the following systems:

1.   x^2 + y^2 = 81
     y = 4x + 1



2.   (x - 4)^2 + y^2 = 16
        y = -2x + 12




3.   (x + 2)^2 + (y - 1)^2 = 75
       3x + 4y = 12