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arsen [322]
3 years ago
8

A stereo that cost $500 and sold for $750 in profit percentage​

Mathematics
1 answer:
Mashutka [201]3 years ago
7 0

Answer:

50% profit

Step-by-step explanation:

750-500 is 250 so that is a 50% profit/markup

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Using complete square to slove for x in the equation (x+7) (x-9)=25
Brrunno [24]

Answer:

x_1=1+\sqrt{89}\\\\x_2=1-\sqrt{89}

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Pick the coefficient of the x term, divide it by 2 and square it:

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Rewriting the left side as a squared binomial, we get:

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And finally we need to add 1 to both sides of the equation. Then we get:

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3 years ago
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