Question

the local store is having a sale on ground beef- $10 for 3 pounds. sylvia needs 12 pounds of meat to make 50 hamburgers. how much will the ground beef for each hamburger cost?

Answer 1

10/3 = x / 12.....$ 10 to 3 lbs = $ x to 12 lbs
cross multiply
3x = 120
x = 120/3
x = 40....so it is gonna cost Sylvia $ 40 for the meat.

she plans on making 50 burgers......40 ($ worth of meat) / 50 (burgers)  = 
0.8....so for each burger, the meat will cost 0.80 or 80 cents <==