2(c + 3) = c - 13
Solve

How do you use the elimination method for this question? explain, because i really want to understand!

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?

What are the digits that repeat in the smallest sequence of repeating digits in the decimal equivalent of 24/11?