Answered

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Four glasses of milk and 3 snack bars have a total of 82 carbohydrates (carbs), and 2 glasses of milk and 4 snack bars have a total of 76 carbs. Determine how
many carbs are in one glass of milk and in one snack bar.

Sagot :

sqdancefan

Answer:

  • milk: 10 carbs
  • snack bar: 14 carbs

Step-by-step explanation:

Let m and s represent the carbs in the milk and snack bar, respectively. The given relations are ...

  4m +3s = 82

  2m +4s = 76

Subtracting the first equation from twice the second gives ...

  2(2m +4s) -(4m +3s) = 2(76) -(82)

  5s = 70 . . . . . . . simplify

  s = 14 . . . . . . . divide by 5

We substitute this into the second equation to find m.

  2m +4(14) = 76

  m +28 = 38 . . . . divide by 2

  m = 10 . . . . . . subtract 28

There are 10 carbs in a glass of milk; 14 carbs in a snack bar.

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