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OpenStudy (anonymous):
PLZ HELP A scanner scanned 63 photos in 9 minutes. If it scans photos at a constant rate, it can scan_____ photos in 21 minutes
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OpenStudy (anonymous):
do you know the answer? try it now!
OpenStudy (sleepyjess):
Ok, so if it scans 63 in 9 minutes how many could it scan in 1 minute
OpenStudy (anonymous):
so you subtrack 21 minutes to 63??
OpenStudy (anonymous):
am i right
OpenStudy (anonymous):
42??
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OpenStudy (sleepyjess):
so 63/9=photos per minute
OpenStudy (anonymous):
so 42 photos per minute
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