effort is 12 years older than mercy her sister in 4 years time, effort will be twice as old as mercy. what is mercy present age.

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Aparking garage charges $1.12 for the first hour and 0.50 for each additional hour. what is the maximum length of time tom can park in the garage if we wishes to play no more than $5.62

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?