Answer:
12.
Step-by-step explanation:
To find the mean of a group of data, you add up all of the numbers and divide the total by the amount of numbers there are. In this case, you have 15,11,10,11,14,10,15,10,and 12.
All of those numbers added together is 108.
108 divided by 9 numbers, or weeks, is 12.
The average, or mean, is 12.
12
To get the mean score , sum the scores and divide the result by the number of scores
That’s
15 + 11 + 10 + 11 + 14 + 10 + 15 + 10 + 12 = 108
Therefore
108/9 = 12
The quiz mean score is 12
3x+7+4=44|-4
3x+7=40|-7
3x=33|÷3
x=11
$129
We need to find 15% of $860.
15% of $860 =
= 15% * $860
= 0.15 * $860
= $129
