How do you solve 9r=3r+6

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?

Select the correct answer and solve for y

In a sale there is 25% of all prices a chair costs £45 in sale how much was it before the sale