How do u get the answer of 40 5(3x-4)=40

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.

Describe the domain and range of y=2(3)^x-2+5

What is the slope of the line that contains the points (-2,1) and (0,-3)