The perimeter of a triangle is 50 cm. one side is 7cm longer than the another side and 5 cm shorter than the third side. find all the sides of the triangle.

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?

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

An arithmetic series a consists of consecutive integers that are multiples of 4 what is the sum of the first 9 terms of this sequence if the first term is 0