57+23 = 80
not rounded it's 80.14
The answer would be A. He should use the mean because it is in the center of the data. I hope this helped ^^
∠1 + ∠3 + 90° = 180°
∠1 + ∠3 = 90°
∠3 = ∠4 (vertically opposite angles)
∠1 + ∠4 = 90°
Therefore, the answer is ∠1 + ∠4
If 3 people are going to the store each day
the probablity is 100%
Answer: Advertisement?
Do I need an explanation? : Y e s I d o
