A.
Total hours worked = 23 + 30 + 11 + 18 = 82 hours (in 4 week)
Total amount = $1148
Hourly Pay = p dollars per hour
Equation for Gross Pay:

B.
To find his hourly pay, we simply divide his total (1148) with the number of hours worked (82 hrs). Thus, we have:

Sam's hourly rate: 14 dollars per hour