(3x + 4) + (5x - 6) add or subtract horizontally

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.

What is the volume of a cone with a height of 6 cm in the radius of 2 cm

What is the value of f(x) = 2.2 for f(-2)?