Sophia takes guitar lessons at home every Sunday. Her instructor charges $15 to cover home visit costs, and $30 per hour of training. One Sunday, Sophia's mother pays the instructor $75 for the guitar lessons.
Select the equation that represents the given situation and find the number of hours of Sophia's lesson.
A.
15x + 30 = 75; 3 hours
B.
30x + 15 = 75; 2 hours
C.
15x + 30 = 75; 2 hours
D.
30x + 15 = 75; 3 hours
C.
15x + 30 = 75; 2 hours