Solve for x and y simultaneously if:
x+4=2y and y2-xy+21=0
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The rectangle on the right is the image of the rectangle on the left. what transformation would result in this image? reflection rotation translation dilation

Which will form a composite function?

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.