At a sleep over, six friends were talking about the number of hours of sleep they usually get each night. Five of them said: 12,
9,4,8, & 7 hours. The sixth friend said, “ the average of our sleep hours is 9, so how many hours do I sleep ?
1 answer:
Answer:
So average of a set of values is the sum of given values divided by the number of values
So, in this case the given values are 12, 9 , 4 , 8 ,7 and x (letting the 6th friend's time be x)
so the average will be:
(12 + 9 + 4 + 8 + 7 + x)/6 = 9
40 + x = 54
x = 54 - 40
x = 14 hours
You might be interested in
Cause people believe men work harder and they don’t think women have the rights to get as much money
Answer:
3
Step-by-step explanation:
i did it on a graph but i dont actuall have a way to show u but this is the answer
Trapezoid Area = (Bases / 2) * Height
20 cm² = 5 * Height
Height = 4 cm
Answer:
1 7/8
Step-by-step explanation:
1/4=2/8
2+2/8-3/8= 1 7/8
