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IgorLugansk [536]
3 years ago
14

Joey made 300 greeting cards. He sold 40% of the cards, gave 85% of the remaining cards to him friends, and kept the rest of the

cards for himself. How many greeting did he keep for himself?
Mathematics
1 answer:
Sedbober [7]3 years ago
4 0
I believe he kept 18 cards.
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adelina 88 [10]
<h2>Hello!</h2>

The answer is: The correct dose of medication to give is 5.6 mL

<h2>Why?</h2>

To solve this problem we need to establish a relationship between the prescripted medication and the available solution.

Let's write the needed equations to establish the relantionship:

\frac{125mg}{5mL}=1\\\\125mg=5mL

The available solution means 125 mg each 5 mL of solution, so:

\frac{125mg}{5mL}=\frac{140mg}{x}\\\\x*\frac{125mg}{5mL}=140mg\\\\x=140mg*\frac{5ml}{125mg}=\frac{700mg*mL}{125mg}=5.6mL

Hence, the correct dose of medication to give is 5.6 mL of the 125 mg/5mL solution.

Have a nice day!

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<em>Step 5 : Solve subtraction</em>         20

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