Question

1. Renting a bicycle at a local Bike shop costs $30 for the first day and $10 for each additional day.

Answer 1

(a)    d=days C=cost  
   
       d       C
       1       30
       2       40
       3       50
       4       60

C=10(d-1)+30

(b) C=10(5-1)+30
      C=40+30
      C=70