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# to find r, the rate the electrician charges per hour, in terms of x and f. If the invoice amount is $450 and the weekend fee is$75, what is the hourly rate?

An electrician sent Bonnie an invoice in the amount of z dollars for the six hours of work done on Saturday.  The electrician charges a weekend fee f in addition to an hourly rate r. Write a formula Bonnie can use to find r, the rate the electrician charges per hour, in terms of z and f. If the invoice amount is $450 and the weekend fee is$75, what is the hourly rate?

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Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors

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