
Clive T. answered 01/29/16
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This problem could be solved in two different ways.
Method 1 (Standard Method): Setting up an equation with the unknown variable as the regular hourly rate:
Let x denotes the regular hourly rate, according to the description of the problem, for hours worked in excess of 40 hrs (not Sunday) the hourly rate is 1.5x; for hours worked on Sunday the hourly rate is 2x.
Leigh worked 50 hrs, among which 4 of them are on Sunday, which are paid with 2x per hour. We deduce that 50 - 40 - 4 = 6 hours are paid with 1.5x per hour.
We have 40*x + 6*1.5x+4*2x = $798, i.e. 57x = $798. We can find out that x = $798/57 = $14.
So the regular hourly rate is $14/hr.
Method 2 (Simpler but require more thought):
Instead of considering double rate on Sunday, we can see thing in another angle: working one hour on Sunday is as working 2 hours on a weekday that receives regular hourly pay.
Hence, since Leigh works 6 hours beyond 40 hours threshold and 4 hours on Sunday, it is as if he has worked for 40 + 1.5*6 + 2*4 = 57 hours with a regular hourly pay.
Since he got paid $798 in total, so the regular hourly rate should be $798/57hr = $14/hr.
Daisy B.
01/29/16