Write the algebraic expression for 3 less than the product of Y and 2

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

How many $20 bills do you need to have to make $280

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.