lexie7752
05.10.2019 •
Mathematics
The sum of the reciprocal of a number and the reciprocal of 2 less than the number is 7 times the reciprocal of the original number. find the original number.
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Ответ:
1/(n-2)=7/n-1/n
1/(n-2)=6/n
n=6(n-2)
n=6n-12
5n=12
n=12/5
Ответ:
80 minutes
Step-by-step explanation:
The ratio can be simplified and rewritten:
minutes : miles = 24 : 3 = 8 : 1 = 80 : 10
It will take Josie 80 minutes to run 10 miles at her 8 minutes/mile pace.