Question

The sum of the angle measures of any triangle is 180 degrees. Suppose that one angle in a triangle has a degree measure of +3x3 and another has a degree measure of −5x4 . Write an expression for the degree measure of the third angle in the triangle.

Answer 1

I'll have to assume that you meant 3x^3 and 5x^4 degrees. Use " ^ " to denote exponentiation.

180 degrees - (3x^3 + 5x^4) degrees = third angle (in degrees).