Problema Solution
At the Happy Burger Drive-In, you can buy two hamburgers, one chocolate shake, and two orders of fries or three hamburgers and one order of fries for $9.50. One hamburger, two chocolate shakes, and one order of fries cost $7.30. How much does a hamburger cost?
Answer provided by our tutors
let
h = the cost of one hamburger
s = the cost of one shake
f = the cost of one order of fries
you can buy two hamburgers, one chocolate shake, and two orders of fries or three hamburgers and one order of fries for $9.50
2h + s + 2f = 9.50
3h + f = 9.50
one hamburger, two chocolate shakes, and one order of fries cost $7.30
h + 2s + f = 7.30
by solving the system of equations
2h + s + 2f = 9.50
3h + f = 9.50
h + 2s + f = 7.30
we find
h = $2.8
click here to see the step by step solution of the system of equations
one hamburger costs $2.8.