What is the slope of a line that contains the points (-1, 9) and 5, 21)

Me! #1 write an equation for the interior angles of this triangle that uses the triangle sum theorem. #2 what is the value of x? #3 what is the measure of #4 classify the triangle above as acute, obtuse, or right. state your reason in a complete sentence.

Explain how you can use the associative property to evaluate (7x50)x4.

If 3x+8=3x+8 is it one solution or no solution