The sum of four conservative numbers is 230. what is the largest of the numbers

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.

Is it greater than or less than7*3_9*2

Solve the equation by completing the square. x^2+2x=17