Problema Solution
The number of calories in a piece of pie is 20 less than three times the number of calories in a scoop of ice cream. The pie and ice cream together have 500 calories. How many calories in each?
Answer provided by our tutors
let
p = the number of calories in a piece of pie
s = the number of calories in a scoop of ice cream
the number of calories in a piece of pie is 20 less than three times the number of calories in a scoop of ice cream
p = 3s - 20
the pie and ice cream together have 500 calories
p + s = 500
by solving the system of equations
p = 3s - 20
p + s = 500
we find
p = 370 cal
s = 130 cal
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a piece of pie has 370 calories.
a scoop of ice cream has 130 calories.