Jenna and her mom are addressing envelopes for jenna's wedding invitations. so far, jenna has addressed 2/9 of the envelopes, and her mom has also addressed 2/9 . what portion of the envelopes have they addressed so far?

15 pts.

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?