SAT Linear equations in one variable Practice Question 2 (Easy)

Question bank / Linear equations in one variable

Math · AlgebraEasy

A plumber charges a $\$65$ service fee plus $\$40$ for each hour of work. If a customer's total charge was $\$245$ , how many hours did the plumber work?

$4$

$4.5$

$6.125$

$7.75$

Show answer and explanation

Answer: B

The total charge is $40h + 65$ , where $h$ is the number of hours. Set $40h + 65 = 245$ . Subtract 65: $40h = 180$ . Divide by 40: $h = 4.5$ .

Choice C comes from dividing $245$ by $40$ without first removing the $\$65$ service fee.

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