Solve each system of linear equations by using the elimination method.
x+y=-4
2x - y = 1

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?

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form

How do you write a paragraph proof to prove that the corresponding angles shown are congruent