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4 years ago

Please help on this one?

Mathematics

1 answer:

viva [34]4 years ago

8 0

Answer: I believe that the answer is B. F(x) = x^2 - 9 / 7x

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A handy man charges $40 an hour plus the cost of materials. Rosanne received a bill from the handyman for $477 for 8 hour of wor

djverab [1.8K]

Should be something like 40(8)+ ?= 477$

5 0

4 years ago

Read 2 more answers

Some parts of California are particularly earthquake-prone. Suppose that in one metropolitan area, the chance a homeowner is ins

ollegr [7]

Answer:

P(X = 0) = 0.1897

P(X = 1) = 0.3910

P(X = 2) = 0.3021

P(X = 3) = 0.1038

P(X = 4) = 0.0134

Step-by-step explanation:

For each owner, there are only two possible outcomes. Either they are insured against an earthquake, or they are not. The probability of a homeowner being insured against an earthquake is independent of other homeowners. So the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

Suppose that in one metropolitan area, the chance a homeowner is insured against an earthquake is 0.34.

This means that $p = 0.34$

A sample of four homeowners are to be selected at random.

This means that $n = 4$

(a) Find the probability mass function of X. (Round your answers to four decimal places.)

The pmf is the probability of each outcome.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{4,0}.(0.34)^{0}.(0.66)^{4} = 0.1897$

$P(X = 1) = C_{4,1}.(0.34)^{1}.(0.66)^{3} = 0.3910$

$P(X = 2) = C_{4,2}.(0.34)^{2}.(0.66)^{2} = 0.3021$

$P(X = 3) = C_{4,3}.(0.34)^{3}.(0.66)^{1} = 0.1038$

$P(X = 4) = C_{4,4}.(0.34)^{4}.(0.66)^{0} = 0.0134$

8 0

3 years ago

Read 2 more answers

1.Define phase shift. Could every sine function be expressed as a phase shifted cosine function? Explain.

Ann [662]

A phase shift is defined as the a<span>mount of x by which sinusoid is shifted to the left or right.

And yes, </span><span>every sine function be expressed as a phase shifted cosine function:
</span>
sin(t)=cos(90-t)

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

4 0

3 years ago

At Pizza Pi, 20% of the pizzas made last week had extra cheese. If 50 pizzas had extra cheese, how many pizzas in all were made

Mekhanik [1.2K]

Answer:

250 pizzas

Step-by-step explanation:

We can use the formula 50 = 20/100x. We multiply both sides by 100 to get 5000 = 20x. Now, we divide both sides by 20 to get 250 = x. That means 250 pizzas were made last week.

4 0

3 years ago

HELP PLEASE ILL MARK BRAINLIEST

gavmur [86]

Answer:

B. $\frac{3+\sqrt{29} }{2}$