Can some help me with 12 and 13 and 14

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.

The square root of 9x plus 7 plus the square rot of 2x equall to 7

#7. m is the midpoint of pq, the diameter of the circle o is 13in. and rm = 4in. find pm find pq