The equation x2 - 2x + y2 - 4y = 20 defines a circle in the xy-coordinate plane. What is the radius of the circle?
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7(x - 2) = 3(x + 4) solve the following equation. then enter your answer in the space provided using mixed number format.

The perimeter of a rectangle is greater than or equal to 74 meters. if the length is 25 meters, the minimum width of the rectangle is meters.

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?