Acar travels 30 1/5 miles in 2/3 of an hour

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?

Jalen charges $25.50 for every 3 hours of yard work he does for his neighbors. ralph charges $34 for every 4 hours of work that he does. who charges less? opinions: 1.they charge the same amount 2.jalen 3.ralph

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great