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 +3x2 and another has a degree measure of +8x7 . Write an expression for the degree measure of the third angle in the triangle.

Answer 1

One angle has +3x^2 degrees measure 
another has +8x^7 degrees measure 

total has 180 degrees measure 

so the third angle has a measure of 180 -(3x^2 +8x^7)  degrees 

hope this will help you