PLEASE HURRY 20 POINTS simplify the following expression by combining like terms: 4x + 16y - x + 3y

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

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

9/10 divide by -3/15 as a mixed number