Using it's formula, it is found that Val's margin of error is of 9.8 pounds.
<h3>Margin of error:</h3>
The margin of error is given by the following equation:
In which:
- s is the standard deviation.
In this problem:
- The standard deviation is of 50, hence
.
- Val weighed 100 cows, hence
.
Then:
Val's margin of error is of 9.8 pounds.
You can learn more about margin of error at brainly.com/question/14510808
Answer:
n²-7n-21
Explanation:
Given the expression:
First, open the brackets:
Next, bring the like terms together and simplify:
Answer:
11
Step-by-step explanation:
a = d1+d2 all divided by 2
7+7+4+4/2
14+8/2
22/2
11
Complementary angles = 90°
x= angle 1
(90-x)= angle 2
Subtract the two angles to get the difference between them (18°).
(90-x) - x= 18
combine like terms
90 - 2x= 18
subtract 90 from both sides
-2x= -72
divide both sides by -2
x= 36° angle 1
Substitute answer in to find angle 2:
=90 - x
=90 - 36
=54° angle 2
Hope this helps! :)
I think it’s b it only makes since
