What is the next term of the geometric sequence? 72,36,18

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike

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

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.