(can someone me) which of the following steps in this proof contains a flaw?

step 3 (incorrect multiplicative inverse)
step 4 (subtracted wrong expression)
step 5 (factored incorrectly)
step 6 (factored difference of two squares incorrectly)

Suppose g(x) = f(x + 3) + 4. which statement best compares the graph of g(x) with the graph of f(x)?

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"

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?