When does a barbershop quartet have 16 legs

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

When the ball has traveled a distance of

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.