an electrician charges $75 as a one time fee plus an additional $45 per hour.If the total bill is $131.25, how many hours did it take for the electrician to complete the repair
Let's say the electrician took x hours to complete the repair.
The total cost of the hours is $45*x = $45x
The one-time fee plus the cost of the hours is $75 + $45x = $75+$45x = $75+$45x = $45x+$75
Since the total bill is $131.25, then $45x+$75 = $131.25
Subtracting $75 from both sides gives $45x = $131.25-$75
$45x = $56.25
Dividing both sides by $45 gives x = $56.25/$45
x = 1.25
The electrician took 1.25 hours to complete the repair. Answer: \boxed{1.25}.