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Debora [2.8K]
3 years ago
15

For every 6 kg of a child's weight, pediatricians prescribe 7 mg of fever reducer. If Greg weighs 42 kg, how many milligrams

Mathematics
2 answers:
kari74 [83]3 years ago
8 0

Answer: 49 mg

Step-by-step explanation:

Hi, to answer this we have to use proportions.

Proportion = weight/ mg of fever reducer

For every 6 kg of a child's weight, pediatricians prescribe 7 mg of fever reducer: 6/7

For 42 kg: 42/x

Where x is the amount in mg of fever reducer for Greg.

6 /7 = 42/x

Solving for x

x = 42/ (6/7)  

x= 49

Feel free to ask for more if needed or if you did not understand something.

olya-2409 [2.1K]3 years ago
4 0

Answer:

49mg

Step-by-step explanation:

let's call every 7 mg of fever reducer a "dose"

Divide the weight of Greg by the weight per "dose"

42/6 = 7 doses

Each "dose" is 7mg. Multiply the number of doses by 7mg.

7 dose X 7mg = 49mg

Therefore, if Greg weighs 42kg, the pediatrician will prescribe 49mg of fever reducer.

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