Solve by elimination x+y= 0 2x-y= 12
2 answers:
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Answer:
95% CI = ( 8.024 , 8.936 )
Step-by-step explanation:
Developing the exercise for a normal distribution then we have to calculate the degrees of freedom,
Where n, is our sample.
So in the table,
t = 2.1604
<em>**Assumptions:</em>
<em>Population is normal distributed</em>
Answer:
The length of the missing leg is 22.20.
Step-by-step explanation:
You can use the Pythagorean theorem to solve for the length of the missing leg:
+
=
, where <em>a</em> and <em>b</em> are the lengths of the legs and <em>c</em> is the length of the hypotenuse.
First, substitute the lengths of the given values:
+
=
Next, simplify the exponents on both sides:
36 + = 529
Then, isolate <em>b </em>by subtracting 36 from both sides:
= 493
Next, take the square root of both sides:
<em>b</em> =
Finally, take the square root and round according to the given directions:
<em>b</em> = 22.20