Question. i have some math problems that i really need with and this is all new to me. the direction are as follows:
combine like terms 7x4 -5x4 the number four is square root. i don't understand at all what to do. .

Aclothing designer is selecting models to walk the runway for her fashion show. the clothes she designed require each model’s height to be no more than y inches from 5 feet 10 inches, or 70 inches. which graph could be used to determine the possible variance levels that would result in an acceptable height, x?