Answer:
x=120°
Step-by-step explanation:
sum of all angles in a triangle is equal to 180
let the unknown angle be



Answer:
Step-by-step explanation:
B yes their slopes are negative reciprocals
Slope-intercept form is y=mx+b. our goal is to get y by itself on one side of the equation.
2x-3y+1=0
2x+1=3y
3y=2x+1
y=(2/3)x+1/3
That is the same function but in slope-intercept form.
The answer is negative twelve -12
Hope this helps