Cory has a sister named Jessica. Jessica is 7 years older than twice Cory's age. Write an
expression that represents the relationship of
Jessica's age in terms of Cory's age, c.

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)