Yoko purchased a prepaid phone card for \$25$25 . long distance calls cost 2121 cents a minute using this card. yokoyoko used her card only once to make a long distance call. if the remaining credit on her card is \$20.59$20.59 , how many minutes did her call last?

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?