Area of an octagon with a base of 12 and height of 14.5

Which expression gives the area of the triangle shown below

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.

Solve the inequality and graph 6j - 7 < 5