Answer:
B
Step-by-step explanation:
5x + − 2x + − x
(5x + − 2x + −x)
2x
We can first pull the x out of every term:
Then, simplify:
So, the answer is 2x.
the answer may be this: 8 √3
4/3-7/9=12/9-7/9=5/9.
4.53
Given the data :
4, 5, 10, 11, 15
The mean = 9
The standard deviation of a sample :
s = √[Σ(x - mean)²/(n-1)]
s = √[((4-9)² + (5-9)²+(10-9)² + (11-9)² + (15-9)²) / (5-1)]
s = √(25+16+1+4+36)/4
s = √20.5
s = 4.527
s = 4.53
;