Can someone me with this equation?

How can we find the measure of an exterior angle if we know the measurement of an interior angle

The only way to identify an intercept is as an ordered pair. true false

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.