Nevaeh's coffee shop starts the day with $50 in the cash register. The shop earns $25 each hour for the 8 hours it is open. Usin
1 answer:
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Let the total sum of the scores of the first class of 35 students be a. The mean is 74.3 .
So
Also, let the total sum of the scores of the second class of 28 students be b. The mean is 67.6 .
so
The combined group has 35+28=63 students. The sum of their scores is
a+b=2600.5+1892.8=4493.3
Thus, the mean of the combined group is
So
Also, let the total sum of the scores of the second class of 28 students be b. The mean is 67.6 .
so
The combined group has 35+28=63 students. The sum of their scores is
a+b=2600.5+1892.8=4493.3
Thus, the mean of the combined group is
Answer:
4 miles
Step-by-step explanation:
<u>Walking:</u>
Distance = d miles
Rate = 4 mph
Time = t hours
<u>Biking:</u>
Distance = d miles
Rate = 10 mph
Time hours (convert minutes to hours)
Hence,
Therefore, the distance to friend's house is
and the total distance of the round trip is