Problema Solution
at a concession stand, seven hot dog(s) and four hamburger(s) cost $21.25; four hot dogs and seven hamburgers cost $22.75. find the cost of one hot dog and the cost of one hamburger.
Answer provided by our tutors
let
h = the cost of one hamburger
d = the cost of one hotdog
seven hot dog(s) and four hamburger(s) cost $21.25
7d + 4h = 21.25
four hot dogs and seven hamburgers cost $22.75
4d + 7h = 22.75
by solving the system of equations
7d + 4h = 21.25
4d + 7h = 22.75
we find
d = $1.75
h = $2.25
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