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PLEASE HELP WILL MARK BRAINLEST AND GIVE LOTS OF POINTS!

Peter went to a department store and paid $59.59 per fire alarm for seven fire alarms and a flat rate fee for installation for a total of $452.98. Ashley went to another store and paid $58.29 per fire alarm for seven fire alarms plus a per fire alarm installation fee for a total of $453.39. What is the difference in the amounts they paid in installation charges?
A. $9.61
B. $9.51
C. $10.51
D. $10.61

Respuesta :

dwh2o13
For each person the Total paid = cost of 7 fire alarms + the installation fee.

To find the installation fees consider the following: F = installation fee
Peter: 452.98 = 7(59.59) + F therefore F = 35.85

Ashley: 453.39 = 7(58,29) + F therefore F = 45.36

Now we find the difference between the two fees: 45.36 - 35.85 = 9.51

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