Which one is a rational function? Select all that apply. [Study Guide #18] A y=2x2+x−3x2+2x+5y=\frac{2x^2+x-3}{x ^2+2x+5}y= x 2 +2x+5 2x 2 +x−3 B y=x+2x+4y=\frac{\sqrt{x}+2}{x+4}y= x+4 x +2 C y=3x5y=\frac{3^x}{5}y= 5 3 x D y=1xy=\frac{1}{x}y= x 1

Solve 2x+y=3 x+y=5 in substitution method

Im gonna fail 7th grade selective breeding 1. creates offspring which are genetically identical to the parent 2. is the process of breeding only organisms with desirable traits 3. involves the removal of the nucleus of a cell 4. combines traits from organisms of different species

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?