To calculate: During a four-day period at Hotel Gran Via, the numbers of guests checking in and out were as follows: 32 in and 27 out, 28 in and 31 out, 12 in and 18 out, and 16 in and 25 out. How did the number of guests in the hotel at the end of the fourth day compare with the number at the start of the four-day period?
Answer to Problem 7P
13 guests were less on fourth day as compare to first day
Explanation of Solution
Given information: 32 in and 27 out, 28 in and 31 out, 12 in and 18 out, and 16 in and 25 out
Calculation: "in" means we must add and "out" means we have to subtract.
32 in means 32 , 27 out means -27, 28 in means +28, 31 out means -31, 12 in means +12, 18 out means -18, 16 in means +16, and 25 out means -25.
To get the total change on fourth day we add all in and all out
Here negative sign represents that 13 guests are out on fourth day as compare to first day.
Conclusion: 13 guests were less on fourth day as compare to first day.
Chapter 2 Solutions
Algebra: Structure And Method, Book 1
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