Paul’s Plumbing charges a flat fee of $90 plus $40/h for a plumbing job. Perfect Pipes charges a flat fee of $60 plus $55/h for a plumbing job.
Write expressions to represent the total costs of a plumbing job for each company.
Let h represent the time, in hours, of a plumbing job.
Is the cost of a 3-hour-long plumbing job the same at both companies?
Write and use an equation to find out.

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