C=1.75b, where see represents the cost in dollars and b represents the number of boxes of crackers

Hi my sisters and brothers can tell me the answer because i don’t understand the question

What point is the projection of q on a) r b) s c) t

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.