Find the constant of proportionality (r) in the equation y=rx

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.

What is 20+(5 x 2/5 )+ 3 show your work

Identify the graph of y = ln x + 1.