8.3x10^-1, I get 0.8300000000000001 when I use parentheses, the way you have it written, I get NaN
The answer for you're question is 4600
The answer to this is the system has no solution.
The internal angles in a triangle add up to 180
I think the question should say
'2 angles in a triangle add up to 115 degrees'
so therefor
x+y+z=180
2 angles are x+y
115+z=180
z=3rd angle
solve
115+z=180
subtract 115 from boths ides
z=65
answer is third angle=65 degrees
