The answer is D) 12
8x +14=9x+12
8x+12=9x
12=1x
x=12
The answer is x= 23/12 OR x=1 11/12 OR x=1.916
Y=1/2 x +4
Slope = x coefficient = rise/run = 2/4=1/2
Y intercept= constant = 4
Since you said angle, I assume you mean a triangle, so:
Take the number of the angles you have and add them, then, subtract it by 180. It gives you the missing angle of your triangle!
The slope is -1 as picking any two points, and finding (y2-y1)/(x2-x1)=-1
