Verify the identity
cos^2x-sin^2x=1-2sin^2x

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

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?