Answer:
A system of two equations can be classified as follows
Step-by-step explanation:
If the slopes are the same but the y-intercepts are different, the system has no solution. If the slopes are different, the system has one solution. If the slopes are the same and the y-intercepts are the same, the system has infinitely many solutions.
Based on the scatter plot on perishable and nonperishable items purchased by customers, the following is true:
- Purchased 5 nonperishable items - 3 people.
- Median number of perishable items = 7 perishable items.
- People bought same number of perishable and nonperishable = 2 people.
<h3 /><h3>What does the scatterplot show?</h3>
Looking at the y-axis which shows the number of nonperishable items bought, the number of dots we find at 5 is 3 which means 3 people bought 5 nonperishable items.
The median of perishable items requires that we order the perishable items bought:
2, 2, 5, 6, 7, 8, 9, 10, 11
The median is 7 perishable items.
The number of people with the same number of perishable and nonperishables are 2 people.
One purchased 8 nonperishables and 8 perishables and the other purchased 9 of both items.
Find out more on scatterplots at brainly.com/question/7802890.
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Answer:
B.) 83.7758
Step-by-step explanation:
Answer:
The 95 % confidence interval for the mean is between 28.09 and 35.97.
Step-by-step explanation:
Mean of the sample:
30 values.
So we sum all the values and divide by 30.
The sum of all the values(43 + 52 + 18 + ... + 20 + 41) is 961.
961/30 = 32.03
Confidence interval:
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 
.
So it is z with a pvalue of 
, so 
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.
The lower end of the interval is the sample mean subtracted by M. So it is 32.03 - 3.94 = 28.09
The upper end of the interval is the sample mean added to M. So it is 32.03 + 3.94 = 35.97
The 95 % confidence interval for the mean is between 28.09 and 35.97.
2b=12-18
2b=-6
b=-3
That is the answer
