Can someone help, marking ! Thank you if you do help .

8.74 rounded to the nearest whole number

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?

Which statement about 6x2 + 7x – 10 is true?