Really need help I’ll mark branliest

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

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?