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attashe74 [19]
3 years ago
15

Josie selected a number n. She divided n by 2 and then subtracted 0.5 from the result. She took half of that result and then sub

tracted 0.5 to get the final result of 10. What is the value of n?
Mathematics
2 answers:
ycow [4]3 years ago
8 0
Your answer is N= Forty three

postnew [5]3 years ago
4 0
The answer is 43

to get this just do the problem backwards from 10 witch you would add .5 to get 10.5 and then multiply by 2 to get 21 then add .5 again to get 21.5 then you multiply it again by 2 to get the answer of 43

hope this helps GL
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Answer:

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Step-by-step explanation:

We have the quadratic equation d^{2}=36d+324  i.e. d^{2}-36d-324=0

As, the roots of the quadratic equation ax^{2}+bx+c=0 are given by x=\frac{-b\pm \sqrt{b^{2}-4ac}}{2a}.

So, from the given equation, we have,

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Substituting the values in x=\frac{-b\pm \sqrt{b^{2}-4ac}}{2a}, we get,

x=\frac{36\pm \sqrt{(-36)^{2}-4\times 1\times (-324)}}{2\times 1}

i.e. x=\frac{36\pm \sqrt{1296+1296}}{2}

i.e. x=\frac{36\pm \sqrt{2592}}{2}

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i.e. x=\frac{36+50.9}{2}  and x=\frac{36-50.9}{2}

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Thus, the roots of the equation are 43.45 and -7.45.

Hence, the factored form of the given expression will be (x-43.45)(x+7.45)=0

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