Answer:
150⁰
Step-by-step explanation:
angles on a straight line add to 180⁰
180-30=150
11l:50
110 min = 1 hour and 50 minutes
I am not sure, but I think you are talking about the least square method
3 and -2
xy = -6
x + y = 1
let 'x' = y-1
y(y-1) = -6
y² - y + 6 = 0
(y-3)(y+2) = 0
y = 3 and -2
