Answer:
Step-by-step explanation:
cubing on both sides we get
4z = (2z+3)(n-1)
4z = 2nz + 3n - 2z - 3
4z - 2nz + 2z = 3n - 3
z(6 - 2n) = 3n - 3
Part A
For Todd's class, we have this given info:
- mu = 70.6 = population mean of math scores
- sigma = 11.9 = population standard deviation of math scores
Compute the z score for x = 74.6
z = (x-mu)/sigma
z = (74.6 - 70.6)/(11.9)
z = 0.34 approximately
Side note: Convention usually has z scores rounded to two decimal places. If your teacher instructs otherwise, then go with those instructions of course.
<h3>Answer: 0.34</h3>
======================================================
Part B
For Garret's English class, we have:
Compute the z score for x = 68.8
z = (x-mu)/sigma
z = (68.8 - 63.7)/(8.6)
z = 0.59 approximately
<h3>Answer: 0.59</h3>
======================================================
Part C
Garret has the higher z score, which means that Garret did relatively better to his classmates compared to Todd's performance (in relation to his classmates). The z score is the distance, in units of standard deviation, the score is from the mean. Positive z values are above the mean, while negative z values are below the mean.
<h3>Answer: Garret did relatively better</h3>
Answer:
5
6
+
4
2
Step-by-step explanation:
1
0
−
8
(
−
7
-
4
)
1
0
+
5
6
+
3
2
1
0
+
5
6
+
3
2
4
2
+
5
6
4
2
+
5
6
5
6
+42
Vicki is correct!
That is because they all took 2/6
so simplified they all took 1/3
Hope this helps ;)
Answer:
x= 7
3x-20
2x+15
you would add 3x+2x equals 5x and 20 +15= 35
5x+35
35 divided by 5 is 7 and then on the 5x divide by 5 and leaves x=7