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3 years ago

What is the length of side BD?

Mathematics

2 answers:

maw [93]3 years ago

7 0

I would say the length of side BD is 26.1 rounded to the tenths place.
Explanation:
You can use Cosine
Equation: Cos(40)=20/x [x being BD]
Or 20/Cos(40) which leaves you with 26.10815...
Therefore BD’s length would be 26.1 when rounded.

VashaNatasha [74]3 years ago

4 0

Answer: 26.1

<u>Step-by-step explanation:</u>

$cos\theta=\dfrac{adjacent}{hypotenuse}\\\\\\cos(40^o)=\dfrac{20}{BD}\\\\\\BD=\dfrac{20}{cos(40^o)}\\\\\\BD=26.1$

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Step-by-step explanation:

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Luba_88 [7]

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Step-by-step explanation:

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The general formula for a geometric series is a(n) = a(1)(r)^(n-1), where a(1) is the first term, r is the common ratio.

Here, we have a(n)= (-12)(3)^(n-1) = -972.

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