Question

which expression represents the total cost for ari to rent a bike for b hours and meg to rent a scooter for s hours?
9 + 10
9b + 10s
(9 + b) + (10 + s)
9 + 10·b + s

rentals
bike $9/h
electric scooter $10/h
kayak $18/h
canoe $20/h
paddleboard $22/h
helmet add $6

Explanation:

Step1: Calculate Ari's bike cost

Cost = Rate × Hours = $9 \times b = 9b$

Step2: Calculate Meg's scooter cost

Cost = Rate × Hours = $10 \times s = 10s$

Step3: Sum the two costs

Total Cost = Ari's Cost + Meg's Cost = $9b + 10s$

Answer:

$9b + 10s$