6x - 5y = 5
3x + 5y = 4
----------------add
9x = 9
x = 9/9
x = 1 <===
Answer:
The 98% confidence interval for the mean purchases of all customers is ($37.40, $61.74).
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
.
So it is z with a pvalue of
, so 
Now, find 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 mean subtracted by M. So it is 49.57 - 12.17 = $37.40.
The upper end of the interval is the mean added to M. So it is 49.57 + 12.17 = $61.74.
The 98% confidence interval for the mean purchases of all customers is ($37.40, $61.74).
Answer: a. 12.39, 12.62, 124, 124
Step-by-step explanation:
The given numbers are : 124, 12.62, 12.39, 124
By using decimals , we convert them into like decimals .
124.00, 12.62, 12.39, 124.00 (To two decimal places)
Now , Least number = 12.39 , Greatest number = 124.00 (Which is repeating)
In order from least to greatest : 12.39, 12.62, 124, 124.
Hence, the correct option is : a. 12.39, 12.62, 124, 124
Answer:
look at the picture above shown
The profit is 10,000 dollars if the profit she sells is 60 kilograms