Express the following in simplest a + bi form.

Rewrite so the subject can be y in the formula d=m-y/y+n

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?

Need plz been trying to do it for a long time and still haven’t succeeded