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Nina [5.8K]
3 years ago
15

What is the ninth term in the sequence an=21+5n

Mathematics
1 answer:
Anni [7]3 years ago
4 0

Answer:66

Step-by-step explanation:

an=21+5n

ninth term is a9

a9=21+5x9

a9=21+45

a9=66

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<img src="https://tex.z-dn.net/?f=5%20%2B1" id="TexFormula1" title="5 +1" alt="5 +1" align="absmiddle" class="latex-formula"> x
soldi70 [24.7K]

Answer:

60

Step-by-step explanation:

Put in Parentheses.

(5 + 1) x 10 =

Solve numbers inside parentheses.

5 + 1 = 6

Now we have 6 x 10.

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8 0
3 years ago
How do I solve this STATS question?
k0ka [10]
We have the following data:

Margin of Error = E = 2.7 % = 0.027
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We need to find the confidence level. For this first we need to find the z value.

The margin of error for a population proportion is given as:

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Using the values, we get:

0.027=z* \sqrt{ \frac{0.6*0.4}{900} } \\  \\ &#10;0.027=z*0.016 \\  \\ &#10;z= \frac{0.027}{0.01633}  \\  \\ &#10;z=1.65

As, seen from the z table, z=1.65 corresponds to the confidence level 90%. So, the answer to this question is option B
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