30.03.2023 - 14:54

An electrician charges $30 for a service call plus $75 per hour of service. If he charged $210, how many hours did he work?

An electrician charges $30 for a service call plus $75 per hour of service. If he charged $210, how many hours did he work?

Answers (1)
  • acme
    April 6, 2023 в 18:03

    Let's assume the electrician worked for "h" hours. Then, the cost of his services would be:

    Cost = $30 + $75/hour x h

    Simplifying this expression, we get:

    Cost = $30 + $75 = $105 for one hour of service.

    If the electrician charged $210 for his services, we can use this information to set up an equation:

    $210 = $105/hour x h

    Simplifying this expression, we get:

    h = $210 / $105 = 2

    Therefore, the electrician worked for 2 hours.

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