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Fed [463]
4 years ago
7

Adele is 5 years old than Timothy. In three years Timothy will be 2/3 of Adele’s age. What is Adele’s current age?

Mathematics
1 answer:
gavmur [86]4 years ago
6 0

Answer:

12

explanation:

when timothy is 10 and Adele is 15 timothy will be 2/3 of Adele's age so just subtract the 3 years from Adele's age and you get 12

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Solve using the quadratic formula. Show all work. Write each solution in simplest form. No decimals.
lawyer [7]

Given:

The quadratic equation is:

12a^2+9a+7=0

To find:

The solution of the given equation in simplest form by using the quadratic formula.

Solution:

If a quadratic equation is ax^2+bx+c=0, then the quadratic formula is:

x=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}

We have,

12a^2+9a+7=0

Here, a=12,b=9,c=7. Using the quadratic formula, we get

x=\dfrac{-(9)\pm \sqrt{(9)^2-4(12)(7)}}{2(12)}

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x=\dfrac{-9\pm \sqrt{-255}}{24}

x=\dfrac{-9\pm i\sqrt{255}}{24}              [\because \sqrt{-a}=i\sqrt{a}]

The solutions of the given equations are x=\dfrac{-9-i\sqrt{255}}{24} and x=\dfrac{-9+i\sqrt{255}}{24}.

Therefore, the correct option is B.

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3 years ago
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astraxan [27]
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xz_007 [3.2K]

Answer:

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