Evaluate the numerical expression. 1/3 - (-1/5)

A) -1/2
B) 1/4
C) 2/15
D) 8/15

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?

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5