Which number sentence shows the commutative property of addition? a) 3 + 0 = 3 b) 3 x 1 = 3 c) 3 + 5 = 5 + 3 d) 3 + (8 + 2) = (3 + 8) + 2

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?