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3 years ago

Need accurate answers immediately geometry

Mathematics

1 answer:

FrozenT [24]3 years ago

7 0

Answer:

I Believe that your answer is D. Sorry if i'm wrong.

Step-by-step explanation:

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What is the rule for the following geometric sequence? 64, -128, 256, -512...

Elena-2011 [213]

Answer:

The previous number keeps getting multiplied by - 2

Step-by-step explanation:

64 ×-2 = -128

-128 × -2 = 256

256 × -2 = -512

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2 years ago

A recursive rule for a geometric sequence is a1=2; an= 4/9 an-1

Oxana [17]

A recursive rule for a geometric sequence:

$a_1\\\\a_n=r\cdot a_{n-1}$

---------------------------------------------------

$a_1=2;\ a_n=\dfrac{4}{9}a_{n-1}\to r=\dfrac{4}{9}$

---------------------------------------------------

The exciplit rule:

$a_n=a_1r^{n-1}$

Substitute:

$a_n=2\left(\dfrac{4}{9}\right)^{n-1}=2\cdot\left(\dfrac{4}{9}\right)^n\cdot\left(\dfrac{4}{9}\right)^{-1}=2\cdot\left(\dfrac{4}{9}\right)^n\cdot\dfrac{9}{4}\\\\\boxed{a_n=\dfrac{9}{2}\cdot\left(\dfrac{4}{9}\right)^n}$

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3 years ago

HELPPPP

yawa3891 [41]

Answer:

It 13

Step-by-step explanation:

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3 years ago

In the triangle shown we can find the angle θ as follows calculator

Xelga [282]

Given a right triangle with hypothenus of measure 34, the side opposite the angle θ of measure 30, and the side adjacent the angle theta of measure 16.

$\sin\theta= \frac{opposite}{hypothenuse} = \frac{30}{34} = \frac{15}{17} \\ \\ \Rightarrow \theta=\sin^{-1}\left( \frac{15}{17} \right) \\ \\ \\ \cos\theta= \frac{adjacent}{hypothenuse} = \frac{16}{34} = \frac{8}{17} \\ \\ \Rightarrow \theta=\cos^{-1}\left( \frac{8}{17} \right) \\ \\ \\ \tan\theta= \frac{opposite}{adjacent} = \frac{30}{16} = \frac{15}{8} \\ \\ \Rightarrow \theta=\cos^{-1}\left( \frac{15}{8} \right)$

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3 years ago

Wyatt estimates that it will cost $425,000 to send his daughter to a private college in 18

Feliz [49]

Interest = p times R times T

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3 years ago