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3 years ago

20,10,5, 2.5 What is the Common ratio

Mathematics

2 answers:

lbvjy [14]3 years ago

5 0

Answer:

5 (probably not right i havent done this type of math in a long time)

Step-by-step explanation:

Levart [38]3 years ago

5 0

Answer:

Common ratio is 0.5.

Step-by-step explanation:

r = 10/20 = 5/10 = 2.5/5 = 0.5.

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Please help, it is similar to angles. halpp

Strike441 [17]

Answer:

Step-by-step explanation:

Because those 2 lines are parallel, then 2x + 10 and 2x - 30 are same side interior and are supplementary. Therefore,

2x + 10 + 2x - 30 = 180 and

4x - 20 = 180 and

4x = 200 so

x = 50

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3 years ago

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sergiy2304 [10]

(6-8i)
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3 years ago

Given a 10 foot length of the tree trunk with a radius of 3 feet what is the tree trunk section if it was a density of 45 lb/ft

mezya [45]

Answer:

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Step-by-step explanation:

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3 years ago

If f(x)=4-x^2 and g(x)=6x, which expression is equivalent to (g-f)(3)?

Debora [2.8K]

I hope this helps you!

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3 years ago

A researcher takes a simple random sample of 83 homes in a city and finds that the mean square footage is 1628 with a standard d

Anna [14]

Answer: (1583.63, 1672.37)

Step-by-step explanation:

Given : Sample size : n= 83

Sample mean : $\overline{x}=1628$

Sample standard deviation : $\sigma=243$

The population standard deviation $(\sigma)$ is unknown .

The confidence interval for population mean :

$\overline{x}\pm t_{\alpha/2}\dfrac{s}{\sqrt{n}}$

For 90% confidence , significance level = $\alpha=1-0.90=0.10$

Using t-distribution table , Critical t-value = $t_{(\alpha/2, n-1)}=t_{0.05,82}=1.6636$

, where n-1 is the degree of freedom.

Now , 90% confidence interval for the mean square footage of all the homes in that city will be :-

$1628\pm (1.6636)\dfrac{243}{\sqrt{83}}\\\\ 1628\pm (1.6636)(26.672715)\\\\\\\\\approx1628\pm 44.37\\\\=(1628- 44.37,\ 1628+ 44.37)\\\\=(1583.63,\ 1672.37)$

Hence, the 90% confidence interval for the mean square footage of all the homes in that city = (1583.63, 1672.37)

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3 years ago