Answer:
2.5 : 1
Step-by-step explanation:
(1) 150 : 60 ← divide both parts by 10
(2) 15 : 6 → ( not 100 : 60) ← divide both parts by 3
(3) 5 : 2 ← divide both parts by 2
(4) 2.5 : 1
Complete Question
In a random sample of 13 microwave ovens, the mean repair cost was $90.00 and the standard deviation was $15.20. Using the standard normal distribution with the appropriate calculations for a standard deviation that is known, assume the population is normally distributed, find the margin of error and construct a 98% confidence interval for the population mean u. A 98% confidence interval using the t-distribution was (78.7,101.3). Compare the results. The margin of error of u is
Answer:
The value is 
Step-by-step explanation:
From the question we are told that
The sample is 
The sample mean is 
The standard deviation is 
The lower limit of the 98% confidence interval is 
The upper limit of the 98% confidence interval is 
Generally the margin of error is mathematically represented as
=> 
=>
The answer to your question is. 103.2
To figure out if the ordered pairs are a solution to the equations, you would need to plug in the points. Your points are ordered as (x,y)
You would plug in the number that's in the x spot in x, and the number in the y spot in y.
Let's start of with the first problem:
First thing you would do is plug in (-1) to x, and 6 to y.
Your equations would look like this:
6(-1) + 3(6) = 18
2(-1) + 6 = 7
What you would now do is solve the equations. When you solve them, you would get these answers
12 = 18
4 = 7
For #1, it would be no solution because the numbers do not equal each other. (Fun fact) If one of them ends up as a solution, but the other is no solution, the answer would be no solutions because BOTH of them have to be a solution to the equations given in order to be a solution.
If you do the same strategy, (plugging in the numbers to x and y), you would get the rest of the answers for the problems.
I hope this helps, if you need any more assistance, I would be glad to help!
Answer:
68
Step-by-step explanation:
you have to add to 180 and 68+112=180
