What is the length of the unknown side of the right triangle?

a. 21
b. 29
c. 400
d. 441

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

Find the distance between (7,-6) and (-3,-9)

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left