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3 years ago

15

alex wants to purchase a set of 9 figurines that cost $38 each. so far he has saved $240 towards this purchase. how much more mo

ney does he need to save?

2 answers:

labwork [276]3 years ago

6 0

9*$38 each= $342 needed

$342-$240=$102 left

Final answer: $102

Ipatiy [6.2K]3 years ago

3 0

Alex needs to save 102$

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2 years ago

Can someone please help with this math question:)

Bingel [31]

<u>Solution</u><u>:</u>

The rationalisation factor for $\frac{1}{ a - \sqrt{b} }$ is $a + \sqrt{b}$

So, let us apply it here.

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The rationalising factor for 5 - √2 is 5 + √2.

Therefore, multiplying and dividing by 5 + √2, we have

$= \frac{1}{5 - \sqrt{2} } \times \frac{5 + \sqrt{2} }{5 + \sqrt{2} } \\ = \frac{5 + \sqrt{2} }{(5 - \sqrt{2})(5 + \sqrt{2} ) } \\ = \frac{5 + \sqrt{2} }{ {(5)}^{2} - ( \sqrt{2})^{2} } \\ = \frac{5 + \sqrt{2} }{25 - 2} \\ = \frac{5 + \sqrt{2} }{23}$

<u>Answer:</u>

<u> $\frac{5 + \sqrt{2} }{23}$ </u>

Hope you could understand.

If you have any query, feel free to ask.

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2 years ago

Read 2 more answers