Answer:
Division Property of Equality
Step-by-step explanation:
Hi, the Division Property of Equality states that when we divide both sides of an equation by a non zero number, both sides of the equation stays the same.
In this case, we divide both sides by 9, and the equality remains the same.
9m=180
9m ÷ 9 = 108 ÷ 9.
m = 12
Feel free to ask for more if needed or if you did not understand something.
Answer:
2.5
Step-by-step explanation:
50 x $0.05 = 2.5
Answer:
Step-by-step explanation: 64646464-444
Answer:
The 95% confidence interval for the average monthly electricity consumed units is between 47.07 and 733.87
Step-by-step explanation:
We have the standard deviation for the sample. So we use the t-distribution to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 45 - 1 = 44
95% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 44 degrees of freedom(y-axis) and a confidence level of . So we have T = 2.0141
The margin of error is:
M = T*s = 2.0141*170.5 = 343.4
In which s is the standard deviation of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 390.47 - 343.40 = 47.07 units per month
The upper end of the interval is the sample mean added to M. So it is 390.47 + 343.40 = 733.87 units per month
The 95% confidence interval for the average monthly electricity consumed units is between 47.07 and 733.87