Astereo system costs $275. it was on sale for 15% off. the sale person receives a 2% commission. how much of a commission do they receive?

I'm so close to finishing all these.

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression

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.