What is the result of 5 divided by 1/5?

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9

Using elimination, what is -4x+2y=-12 4x+8y=-24

Use stokes' theorem to evaluate c f · dr where c is oriented counterclockwise as viewed from above. f(x, y, z) = xyi + 5zj + 7yk, c is the curve of intersection of the plane x + z = 8 and the cylinder x2 + y2 = 81.