Solve for y
-5y + 8 = -3y + 10
whats the answer

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

The measure of an angle is 117°. what is the measure of a supplementary angle?

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.