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tia_tia [17]
3 years ago
9

I need help pliz help me out on this one plizz

Mathematics
1 answer:
Roman55 [17]3 years ago
4 0
This would be a combination I believe not a permutation so the equation to use would be nCr= n!/(n-r)!r!

So 10C2=45
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A radio is being discounted 20%. If the sale price is $51.44, what was the original price of the radio? A. $12.86, B. 64.30, C.
katrin2010 [14]
The equation for decreasing a price by 20% is 
original price x 0.8 = sale price

Here, we can fill in the sale price so
original price x 0.8 = 51.44

This can be rearranged to show:
51.44 ÷ 0.8 = original price

So the original price was $64.30

Answer = B - $64.30

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3 years ago
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2 years ago
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I have k quarters, five less quarters than nickels and one more than twice as many dimes as quarters. Find the value of the coin
Alenkinab [10]

Answer:

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