Answer:
-3
Step-by-step explanation:
x + (x+1) +(x+2)+(x+3)+(x+4)+(x+5)+(x+6) = 0
7x + 21 = 0
x = -3
Answer:
A sample size of 385 is needed.
Step-by-step explanation:
We have that to find our
level, that is the subtraction of 1 by the confidence interval divided by 2. So:

Now, we have to find z in the Ztable as such z has a pvalue of
.
That is z with a pvalue of
, so Z = 1.96.
Now, find the margin of error M as such

In which
is the standard deviation of the population and n is the size of the sample.
You feel that a reasonable estimate of the standard deviation is 10.0 hours.
This means that 
What sample size is needed so that the expected margin of error of your estimate is not larger than one hour for 95% confidence?
A sample size of n is needed. n is found when M = 1. So





Rounding up:
A sample size of 385 is needed.
Its a quadratic. Since x cant be a negative number i used the x=4 answer to plug into the length and width
Answer:
A. None
General Formulas and Concepts:
<u>Algebra I</u>
- Perpendicular Lines/Intersecting Lines have 1 solution.
- 2 identical Lines have infinitely many solutions.
- Parallel Lines have no solution.
Step-by-step explanation:
According to the graph, we see that we have 2 parallel lines. Therefore, there will be no solution.