Can someone help pls

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

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.

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)