Here are four number cards.
you cannot see one of the cards.
9 8 4 ?
the mean is 8.
what is the missing number?

Convert the cartesian equation (x 2 + y 2)2 = 4(x 2 - y 2) to a polar equation. choices: r4 = -4r2 r2 = 4cos2θ r2 = 4sin2θ

What’s the answer ? use the picture to see the problem

Patty made a name tag in the shape of a parallelogram. reilly made a rectangular name tag with the same base and height. explain how the areas of the name tags compare.