Melina has two jobs during the day she works as an office Clerk and in the evening to works as a cashier her office job pays $13 per hour. her cashier job pays her 9.25 per hour. in one week, melania worked 38 hours. she earned a total of $434 how many hours did melania work in each job

Office clerk : 10 hours; cashier;28 hours

Office clerk 16 hours Kashira 22 hours

Office clerk 21 hours cashier 17 hours

Office clerk 22 hours cashiers 16 hours

Respuesta :

x = office clerk and y = cashier

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

13(38 - y) + 9.25y = 434
494 - 13y + 9.25y = 434
-13y + 9.25y = 434 - 494
-3.75y = - 60
y = -60 / -3.75
y = 16 <==== 16 hrs as cashier

x = 38 - y
x = 38 - 16
x = 22 <=== 22 hrs office clerk