When 18 is subtracted from the square of a number the result is 3 times the number. Find the negative solution

Select the quadratic that has root x = 8 and x = -5

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.

Find the solution of this system of equation -7x+y=-20 9x-3y=36