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san4es73 [151]
3 years ago
10

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:

"Triple" denotes multiplication by 3.  Thus, the common factor here is 3.

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.

We need to solve this for n, which represents the last term.

The first step towards solving for n is to divide both sides by -12:

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