Acar travels an average speed of 64 miles per hour. how many miles does it travel in 5 hours and 15 minutes?

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

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12

Anyone know these questions? i need ,.