What kind of shape is this?

convex nonagon

concave octagon

concave nonagon

concave decagon

Z4=289 there should be 4 answers total 2 whole numbers and either 2square root or imaginary number answers

Hurry and answer this! circle x with a radius of 6 units and circle y with a radius of 2 units are shown which steps would prove the circles similar? translate the circles so they share a common center point, and dilate circle y by a scale factor of 4. translate the circles so the center of one circle rests on the edge of the other circle, and dilate circle y by a scale factor of 4. translate the circles so they share a common center point, and dilate circle y by a scale factor of 3. translate the circles so the center of one circle rests on the edge of the other circle, and dilate circle y by a scale factor of 3

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41