Which expression correctly represents "six more than the product of five and a number, decreased by one"? 6+5n-1
6+5+n-1
O 6+5(n-1)
O (6+5)n-1

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?