Use the elimination method to solve the following system. 6x – 7y = –8 –x – 4y = –9

Wrote and expression for the difference of p and 4

X+y=-4 x-y=2 use elimination with adding and subtraction

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?