Answer:
A
Step-by-step explanation:
is the standard deviation of x.
The standard deviation is gotten by:
1. find the average of x-values (add up all the values and divide by number of numbers, which is 5)
2. subtract the average, x bar, from each of the values, square it, and add up the difference
3. Divide that final answer by n, which is 5
4. Take the square root of the answer
<em>Now, let's find the average (x bar):</em>
<em>x bar = 
</em>
<em />
<em>Doing steps 2 & 3 together:</em>
<em>
</em>
<em />
<em>Doing step 4:</em>
<em>
</em>
<em />
Correct answer is A
<em />
Answer:
171
Step-by-step explanation:
multiply 380 times 0.45 so like this:
380 x 0.45 = 171
1. she needs to cover 73.5square ft.
2.about 2 bottles of paint
Answer:
The answer is:
which agrees with the last answer option (D) in the list.
Step-by-step explanation:
In order to add rational expressions, we need to express them with the same denominator. Therefore we examine what factors there are in the first denominator, which happens to be a difference of squares which is readily factored out as:
the second denominator consists of only one of these factors: 
, then in order to express both rational expressions with the same common denominator, we multiply numerator and denominator of the second fraction by the factor: 
Then we get two expressions that can be easily added as shown below:
Okay I'm not too sure on this but I believe it is the third one.
I hope this helps!!
