Need some help with this one.

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.

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length