Find The Sum of this question please much appreciated

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great

B. two events are dependent if the occurrence of one event changes to occurrence of the second event. true or false

Ataxi company charges $3 for pick-up plus $0.65 for each mile. select the expressions that represent the cost in dollars for a taxi pick-up and m miles. mark all that apply.