Gregory grossed $750 one week by working 60 hours. His manager pays him time-and-a-half for all hours worked in excess of 30 hours. What is Gregory's regular hourly wage?
Choose the correct answer:
A) 11
B) 12
C) 10
D) 20
E) 21
Denote by x the regular hourly wage.   Then 1.5x is the hourly overtime wage.   For 30 hours, Andrew received a salary of 30x.   For  60-30= 
<gadget id="calculator"> 60-30</gadget>
<output>30</output>
30 hours, he received 30(1.5x)=45x   Total salary: 30x+45x=75x which equals $750.   75x30 +45= 
<gadget id="calculator">30 +45</gadget>
<output>75</output>
75x which equals $750.   75x=750 implies x=10 (he receives $10 per hour)   Answer 10 10.
<result>C</result>
Gregory grossed $750 one week by working 60 hours. His manager pays him time-and-a-half for all hours worked in excess of 30 hours. What is Gregory's regular hourly wage?