Which of the following is not equal to -6t^2 - t? (a) - (6t^2+t )
(b) (t^2 +8t)-(7t^2 +9t)
(c) (3t^2 - 5t)-(-5t^2 - 4t)
(d) (2t^2 - 3t+1) -(8t^2 - 2t + 1)​

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

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8

What is the product? a-3/15a × 5/a-3