I think it's 9.68 but I might be wrong
X=180-2(60)
=180-120
=40
The length of the other angle is 40°.
The equation in slope intercept for is y = 5/2x + 4
The y intercept is 4

When 0 is in the numerator, then the whole fraction becomes equal to 0.
However if 0 is in the denominator, then it is undefined.