Write the equation in standard form for the circle
-20y = -x^2 - y^2 - 36

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out

Sum of the interior angles of a pentagon