The relationship between variance and standard deviation is :
Standard deviation = sqrt (variance),
Variance = standard deviation^2.
hope this help
Answer:
B. 31
Step-by-step explanation:
The acreage Mr. Flowers intends to sell is 2/3 of his total, so is ...
(2/3)(23 1/4) = (2/3)(93/4) = 31/2 . . . . acres
Divided by 1/2 (which is the size of a lot), we will get the number of lots this will make:
(31/2)/(1/2) = 31/1 = 31
Mr. Flowers will have 31 lots for sale.
Given:
Regular price = r
discount rate = 30%
coupon = $5 off any single item at the store
expression: 3(r - 0.3r) - 5
C.) 3(0.7r) - 5 represents the total cost before tax.
3(r-0.3r) - 5 ⇒ 3(0.7r) - 5
The coupon can only be used once because the problem stated any single item not every single item purchased.
Answer:
Option D
Step-by-step explanation:
From the picture attached,
If each block of the graph is a square with the dimension of 1 unit,
Measure of leg 1 = 5 units
Measure of leg 2 = 12 units
By applying Pythagoras theorem in the right triangle given in the picture,
(Hypotenuse)²= (leg 1)² + (leg 2)²
(Hypotenuse)²= (5)² + (12)²
(Hypotenuse)²= 25 + 144
Hypotenuse = √169
Hypotenuse = 13
Therefore, length of the given line will be 13.
Option D is the answer.
<u>Answer:</u>
Two times the difference of a number x and 7 plus 10.
<u>Step-by-step explanation:</u>
We are to write a phrase which matches the following algebraic expression below:

We can see that there is a bracket with a coefficient outside it so we can express it as:
<em>'Two times the difference of a number x and 7'.</em>
While + 10 can be added to it to complete the phrase:
Two times the difference of a number x and 7 plus 10.