Question

An electrician charges $40 to come to your house she also charges $55 for each hour that she works the electrician charges you a total of $190 how many hours does the electrician work at your house

Answer 1

First lets remove the initial fee
$190 - 40 = 150$
150 is how much she is charging you per hour.
If each hour is 55, lets divide 150 by 55.
$150 \div 55 = 2.7$
She charged you for 2.7 hours (almost 3) of service