How many three-letter sequences are possible that use the letters q, u,a, k,e, s at most once each?

In a certain pentagon, the interior angles are a,b,c,d,e where a,b,c,d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

Why is x= 4 a solution to the proportion 14/x 56/1 6

Cody ran nine miles on his first day of training. the next day he ran 1/8 that distance. how far did he run the second day?