Amie works 6 hours each Saturday and 4 hours each Monday. She also makes $20 a week as a dog walker. She makes a total of $130 each week. If h represents Amie’s hourly rate, which equation can be used to find Amie’s hourly rate?

a. 6h+20=130
b. (6+4)h+20=130
c. (6+4)h=130
d. 4h+20=130