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sesenic [268]
3 years ago
8

Determine if the sequence is arithmetic, geometric, or neither. For arithmetic and geometric sequences, identify the common diff

erence or common ratio. For neither, enter n/a. {-45, -38, -31, -24, ...}
Arithmetic, Geometric, or Neither?

Common difference, ratio, or neither?
Mathematics
1 answer:
pogonyaev3 years ago
3 0

9514 1404 393

Answer:

  • Arithmetic
  • common difference = 7

Step-by-step explanation:

First differences are ...

  -38 -(-45) = 7

  -31 -(-38) = 7

  -24 -(-31) = 7

The first differences are constant, so this is an arithmetic sequence with a common difference of 7.

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Several years​ ago, 39​% of parents who had children in grades​ K-12 were satisfied with the quality of education the students r
BaLLatris [955]
<h2>Answer with explanation:</h2>

Let p be the population proportion  of parents who had children in grades​ K-12 were satisfied with the quality of education the students receive.

Given : Several years​ ago, 39​% of parents who had children in grades​ K-12 were satisfied with the quality of education the students receive.

Set hypothesis to test :

H_0: p=0.39\\\\H_a :p\neq0.39

Sample size : n= 1055

Sample proportion : \hat{p}=\dfrac{466}{1055}=0.441706161137\approx0.44

Critical value for 95% confidence : z_{\alpha/2}=1.96

Confidence interval : \hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}

0.44\pm (1.96)\sqrt{\dfrac{0.39(1-0.39)}{1055}}\\\\0.44\pm0.0299536805135\\\\0.44\pm0.03\\\\=(0.44-0.03, 0.44+0.03)\\\\=(0.41,\ 0.47)

Since , Confidence interval does not contain 0.39.

It means we reject the null hypothesis.

We conclude that 95​% confidence interval represents evidence that​ parents' attitudes toward the quality of education have changed.

8 0
3 years ago
Does anyone need help on anything
Blizzard [7]

Answer:

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Step-by-step explanation:

6 0
3 years ago
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The value of Adam's model railway is $550.
garik1379 [7]

Answer:(c)

Step-by-step explanation:

Given

The initial value of Adam's model is A_o=\$550

the value increases exponentially with the rate of r\%

Time period t=5\ years

Final amount A=\$736

Exponential growth is given by

\Rightarrow A=A_o(1+r)^t

Putting values

\Rightarrow 736=550(1+r)^5\\\\\Rightarrow (1+r)^5=1.338

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ratelena [41]

Answer:

C

Step-by-step explanation:

im not 100% sure but i beleive its C

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At a sale this week a desk is being sold for $391 . This is a 32% discount from the original price . What was the original price
valina [46]
$391 ÷ 68 = $5.75 x 100 = $575
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3 years ago
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