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3 years ago

A geometric sequence has these properties: (its in the image)

Mathematics

2 answers:

Sladkaya [172]3 years ago

5 0

Its 20 cause a n goes into the 5a

kari74 [83]3 years ago

3 0

I think it’s 20

it looked like 20

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Simplify the expression 2a + 5b² - a - b - 3b²

Vikki [24]

Answer:

a+2b²-b (correct order is 2b²+a-b)

Step-by-step explanation:

combine like terms ( terms with the same variable and are to the same power) so thats 5b² and -3b² and 2a and -a. the -b doesnt have any like terms so leave that alone for now. combine like terms 5b²-3b² is 2b² and 2a-a is a. so you have 2b²+a and plug in the -b so you get 2b²+a-b.

6 0

3 years ago

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The quality control manager at a computer manufacturing company believes that the mean life of a computer is 120 months, with a

IrinaK [193]

Answer:

P(X<118.81)=0.0803

Step-by-step explanation:

Assuming the distribution for the mean life is approximately normal, with mean 120 months and variance 64 months^2, we can calculate the parameters for a sampling distribution with sample size = 89 computers.

The sampling distribution mean will be equal to the mean for a single computer:

$\mu_{89}=\mu=120$

The standard deviation will be adjusted by the sample size as:

$\sigma_{89}=\sqrt{\sigma^2/n}=\sqrt{64/89}=\sqrt{0.719}=0.848$

With these parameters, we can calculate the z-score for X=118.81.

$z=\dfrac{X-\mu}{\sigma}=\dfrac{118.81-120}{0.848}=\dfrac{-1.19}{0.848}=-1.403$

Then, the probability that the mean of a sample of 89 computers is less than 118.81 months is:

$P(X$

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3 years ago

What is 9.15 divided by 9

insens350 [35]

1.01666667.....,..............

7 0

3 years ago

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Verbal

Ann [662]

Answer:

If a function is continuous and one - to - one then it is either always increasing or always decreasing.

Step-by-step explanation:

An easy way to see this on a graph is to draw a horizontal line through the graph . If the line only cuts the curve once then the function is one - to - one.

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2 years ago

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I fly to chicago 450 kilometers away it takes 3 hours what is my average speed?

Ratling [72]

150 kilometers per hour

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3 years ago

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