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luda_lava [24]
3 years ago
5

Jeanine is twice as old as her brother Marc. If the sum of their ages is 24. How old is Jeanine?

Mathematics
1 answer:
Tanya [424]3 years ago
4 0
Let Marc's age be x. If Jeanine is twice as old as Marc, then her age will be 2x. If their ages added together are 24, then you can create the following equation:

2x + x = 24
3x = 24
x = 8

Remember that x is Marc's age. So if Marc is 8, and Jeanine is twice as old, she will be 16. 
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Step-by-step explanation:

In general, a calculator is required to evaluate the irrational sum ...

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<h3>Calculator result</h3>

The result from a readily-available online calculator is shown in the attachment.

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__

<em>Additional comment</em>

You have probably memorized pi to several digits: 3.1416. To obtain the required estimate means you need to approximate √70 to about the same level of precision.

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Effectively, the root (r) can be iterated from the recursive formula ...

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