Answer:

And the can be founded with this formula:


And rounded to the nearest tenth we got 
Step-by-step explanation:
For this case we have the following data given:
8, 11, 17, 7, 19
The first step is calculate the sample mean with this formula:

And replacing we got:

And the deviation can be founded with this formula:

And replacing we got:

And rounded to the nearest tenth we got 
Answer:
1) x > -2
2) x < -1
Step-by-step explanation:
1) 2(x - 2) + 7 > -1
2x - 4 + 7 > -1
2x + 3 > -1
2x > -4
x > -2
2) 5 - 4x > 9
-4x > 4
x < -1
Answer:
A.
Step-by-step explanation:
Happy studying! I got this right <3
Answer:
1.A
2.B
Step-by-step explanation:
I hope it helps...........
Answer:
Step-by-step explanation:
Plug into distance formula:
Points: (5, -2), (3, -4)
sqrt( ((x2 - x1)^2) + ((y2 - y1)^2))
sqrt( ((3 - 5)^2) + ((-4 + 2)^2))
sqrt( 4 + 4)
sqrt8 ≈ 2.8 OR
sqrt8 = 2√2