Solve for x. your answer must be simplified. -4x < 9

The multiplication property of zero states that the product of any number and 0 is 0. what must be true about either a or b to make ab=0

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.

How do you determine if an ordered pair is a solution to a given equation?