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Alecsey [184]
4 years ago
14

In a geometric sequence, a4=7 and a6=28 use the geometric sequence to find a5

Mathematics
1 answer:
bearhunter [10]4 years ago
5 0
I hope this helps you

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Answer:

x=12cm

Step-by-step explanation:

Triangle DEF is similar to triangle HGF.

Therefore the corresponding sides are proportional.

We can write the following equations for the corresponding sides.

\frac{DF}{HF}=\frac{EF}{GF}


This implies that,

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This gives us,


\frac{7}{5}=\frac{x+30}{30}


We cross multiply to get,

7\times 30=5(x+30)


We divide through by 5 to get,


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We multiply to get,

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Grouping like terms gives,

\Rightarrow 42-30=x

We simplify to obtain,

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The correct answer is C





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V=pr^2h how to solve for r?
nikdorinn [45]

Answer:

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