<h2>
The city's PR manager was wrong because the mean score of all ninth graders in the city is 83.</h2>
Step-by-step explanation:
The given observations are:
81, 96 and 72
The total number of observations = 3
We know that,
Mean = 


= 83
∴ The mean score of all ninth graders in the city = 83
The city's PR manager was wrong because the mean score of all ninth graders in the city is 83.
Answer:
Step-by-step explanation:
3-21/21-3 = slope
slope =-1
y=-1x+b
21=-3+b
b=24
y=-x+24
Answer: 7.11 or 7.0000
Step-by-step explanation:
Answer:
$13450
Step-by-step explanation:
Total cost=$53,450
Scholarship=$25000
Family=$15000
Balance=$53450-($25000+$15000)
=$53450-$40000
=$13450
Answer:
y = 29
Step-by-step explanation:
y = (3x)2 + 17
y = (3(2))2 + 17
y = (6)2 + 17
y = 12 + 17
y = 29