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Tasya [4]
3 years ago
6

Find (f*f)(x) for the function f(x)=8x+9 and simplify

Mathematics
2 answers:
irakobra [83]3 years ago
8 0

Answer:

I think its f(fx) = 64x + 81

Alexus [3.1K]3 years ago
5 0

Answer:

f(fx) = 64x + 81

Step-by-step explanation:

f(x) = 8x + 9

f(fx) = 8(8x+9) + 9

= 64x + 72 + 9

= 64x + 81

(Correct me if i am wrong)

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svetlana [45]

Answer:

to the 1st one its V=πr2h=π·92·6≈1526.81403

to the second one its V=πr2h=π·32·3≈84.823

ooooorrrrrrrV=πr2h=π·1.52·3≈21.20575

im saying or bc im not finna cap i haven't taken geometry in like 2 years and idk if the radius to second one is 3 or 1.5

Step-by-step explanation:

3 0
3 years ago
If BC = 7 and CD = 24, find AC.
vodomira [7]

Answer:

  2√42 ≈ 12.961

Step-by-step explanation:

All of the right triangles are similar, so ...

  short leg/long leg = BC/AC = AC/CD

  AC² = BC·CD = 7·24 = 168

  AC = √168 = 2√42

3 0
3 years ago
Science ignores
trapecia [35]
Neither beliefs or opinions. Science is open to all opinions and beliefs and can use them to make sense. You could use it to connect with your original beliefs.
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3 years ago
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a city is building bike racks for people who ride their bikes to work and around town. the city will have 47 bike racks with roo
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The city's racks can hold 752 bikes.
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3 years ago
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An airline's public relations department claims that when luggage is lost, 88% is recovered and delivered to its owner within 24
melisa1 [442]

Answer:

The hypothesis statements are: H0: p = 0.88 versus HA : p < 0.88

The p-value of the test is 0.2483 > 0.1, which means that the data does not provide sufficient evidence to conclude that the proportion of times that luggage is returned within 24 hours is less than 0.88.

Step-by-step explanation:

Test if the proportion of times that luggage is returned within 24 hours is less than 0. 88

At the null hypothesis, we test if the proportion is of 0.88, that is:

H_0: p = 0.88

At the alternate hypothesis, we test if this proportion is less than 0.88, that is:

H_a: p < 0.88

The hypothesis statements are: H0: p = 0.88 versus HA : p < 0.88

The test statistic is:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

0.88 is tested at the null hypothesis:

This means that \mu = 0.88, \sigma = \sqrt{0.88*0.12}

A consumer group who surveyed a large number of air travelers found that 138 out of 160 people who lost luggage on that airline were reunited with the missing items by the next day.

This means that n = 160, X = \frac{138}{160} = 0.8625

Test statistic:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

z = \frac{0.8625 - 0.88}{\frac{\sqrt{0.88*0.12}}{\sqrt{160}}}

z = -0.68

P-value of the test:

The p-value of the test is the probability of finding a sample proportion below 0.8625, which is the p-value of z = -0.68.

Looking at the z-table, the p-value of z = -0.68 is of 0.2483.

The p-value of the test is 0.2483 > 0.1, which means that the data does not provide sufficient evidence to conclude that the proportion of times that luggage is returned within 24 hours is less than 0.88.

7 0
2 years ago
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