For the data set 7,5, 10, 11, 12, the mean, x, is 9. What is the standard
deviation?
The formula for the sample standard deviation is s =
2(x-7).
n-1
Use the table to help you.
(x-x)?
7
4
16
1
2
1
4
3
9
Sum =
Round your answer to the nearest tenth.

region b will make the inequalities y < 2x + 1 and y > -x - 2 true ⇒ answer a

step-by-step explanation:

* lets study the graph and the inequality to solve the question

- the inequality y > -x - 2

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = -2 that means the line intersect the y-axis at point (0 , -2)

∵ the sign of the inequality is >

∴ we shad the part over the line

  region a and b

- the inequality y < 2x + 1

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = 1 that means the line intersect the y-axis at point (0 , 1)

∵ the sign of the inequality is <

∴ we shad the part under the line

  region b and c

∵ the common region between the two lines is region b

∴ region b will make the inequalities y < 2x + 1 and y > -x - 2 true

sounds & other waves originate from any vibrating object

after 1 year: 221 deer

step-by-step explanation:

30% of 170 is 51. 170+51=221