chrismusni00 chrismusni00

26-11-2019
Mathematics

contestada

vincent’s copier can print in 7 hours. chris’s printer can do the same in 13 hours. how long would it take to do the job using both copiers

Respuesta :

Lexielove451 Lexielove451

27-11-2019

Answer:

Step-by-step explanation:

1/7+1/13=1/t

multiply both sides by 7*13*t

13t+7t=7*13

21t=91

t=91/19

it will take 4 hours and 8 minutes

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