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Lera25 [3.4K]
3 years ago
7

Melania has two jobs. During the day she works as an office clerk, and in the evening she works as a cashier. her office job pay

s her $13 dollars an hour. Her cashier job pays her $9.25 dollars an hour. In one week, Melania worked 38 hours. She earned at total of $434. How many hours did Melania work in each job?
Mathematics
1 answer:
bulgar [2K]3 years ago
7 0
Lets x = # of hours Melania  works at <span>office clerk
and y = </span># of hours Melania  works as a <span>cashier

x + y = 38 so x = 38 - y
13x + 9.25y = 434

substitute </span> x = 38 - y into 13x + 9.25y = 434

13x + 9.25y = 434
13(38 - y) + 9.25y = 434
494 - 13y + 9.25y = 434
                  -3.75y = -60
                          y = 16
x = 38 - y so x = 38 - 16 = 22

answer
Melania  works at office clerk = 22 hours
Melania  works as a cashier = 16 hours
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