Y^1/3(y^4/9-8y^2/9) how do you solve this

Ihave a 69 and an 82. the 69 is worth 40% of my grade and the 82 is worth 15%. can someone tell me my current average grade.

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

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2