A plumber charges $45 for a service call to come to your house and $18 an hour while he is working. Write a function that shows what the plumber charges for repairs. Is this function linear?

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

The function models the number of accidents

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.