Stuck on this help !

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

How many bananas are in a fruit bowl that has 200 total apples and bananas if there are 31 bananas for every 93 apples