Answer:
none of the above
Step-by-step explanation:
9
900%=900/100=9
420
I can give you alittle head start. I hope it kinda helps.
Dentist A: 50 + 20x
Dentist B: 70 + 5x
It cost 20 more dollars for the visit and 15 dollars less for each cavaty at Dentist B.
139
14+14+28+33+33+17 = 139
