2.5.3 Journal: Proofs of Congruence
2 answers:
You might be interested in
Answer:
The friend's claim is not correct
Step-by-step explanation:
we know that
If two lines are perpendicular, then their slopes are opposite reciprocal (the product of their slopes is equal yo -1)
Example
A given line has a slope of ---> (is less than 1)
the slope of the line perpendicular to the given line is equal to
substitute
so
the perpendicular line don't have a positive slope
therefore
The friend's claim is not correct
Answer:
The sample size should be 273 students
Step-by-step explanation:
Here Raina wants to use 90% interval then
ME = z. SE
SE = s d/√n at end
ME/z = s d/√n
n={z.sd/ME)²
Z = 1.65 =>due to 90%confidence interval
ME= 24
sd=250
putting these value in the question we get 273 students
Answer with explanation:
Test Scores of Shania's in 8 subject are: 88, 91, 85, 74, 69, 72, 80, and 87.
To calculate mean we add all the variate and divide by total number of Variate in the data set.
So, Mean of the Data set
To calculate , how much the scores on her tests vary, on average, from the mean score
We will Calculate mean absolute Deviation.
To calculate it,we will find absolute difference of each variate from mean.
| 88 - 80.75|=7.25
|91-80.75|=10.25
|85 -80.75|=4.25
|74-80.75|=6.75
......
........
Then Shania should calculate mean of the new data set obtained,which is absolute difference of each variate from mean.
→The Measure that,Shania should use to find how much the scores on her tests vary, on average, from the mean score is:
Mean absolute deviation