An elevator starts at the lobby and makes 44 stops. The positive numbers stand for going up, and the negative numbers stand for
going down. Which expression gives the total number of floors traveled during the 44 stops?
a.|9+-12+5+8|
b.9-12+5-8
c.|9|+|12|+|5|+|-8|
d.|(+9)+(-12)+(+5)+(-8)|
a.|9+-12+5+8|
b.9-12+5-8
c.|9|+|12|+|5|+|-8|
d.|(+9)+(-12)+(+5)+(-8)|
2 answers:
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the answer is D you get this from using simultaneous equations the working out is shown in the photo. ignore the stuff at the top of the page
