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lys-0071 [83]
3 years ago
11

a student named sarah hill follow the steps below to find her magic number 1 find the number of letters in her first name 2 find

the number of letters in your last name 3 find the sum of the two numbers 4 multiply the sum by 14 what is Sarah magic number
Mathematics
2 answers:
asambeis [7]3 years ago
7 0
Sarahs magic number is 126
Nata [24]3 years ago
4 0
Her magic number is 126.
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Solve 2x2 + 20x = −38. (1 point)
RoseWind [281]

Answer:

The solutions are x=-5+\sqrt{6}  and x=-5-\sqrt{6}


Step-by-step explanation:

we have

2x^{2} +20x=-38

Divide by 2 both sides

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we know that


The formula to solve a quadratic equation of the form ax^{2} +bx+c=0 is equal to


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in this problem we have


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so


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substitute

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x=\frac{-10(+/-)\sqrt{100-76}}{2}


x=\frac{-10(+/-)\sqrt{24}}{2}


x=\frac{-10(+/-)2\sqrt{6}}{2}


x1=\frac{-10(+)2\sqrt{6}}{2}=-5+\sqrt{6}


x2=\frac{-10(-)2\sqrt{6}}{2}=-5-\sqrt{6}


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