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3 years ago

PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!

Mathematics

1 answer:

dalvyx [7]3 years ago

8 0

Answer:

(0,1)

Step-by-step explanation:

There is a solution where the two equations intersect, therefore:

3x+1=2x+1

3x-2x=1-1

x=0

If we plug this 0 value into the x of both equations, we get a y value of 1:

y=3*0+1

y=0+1

y=1

y=2*0+1

y=0+1

y=1

Therefore, there is a solution at (0,1)

<em>I hope this helped! :)</em>

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The values in a dataset are 3.5, 2.5, 2.5, 3.5, and 3.0. If Xbar (sample mean) = sigma X / n, what is the mean for the sample?

RideAnS [48]

Answer:

$\bar x = 3.0$

Step-by-step explanation:

Given

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Required

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$\bar x = \frac{\sum x}{n}$

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Step-by-step explanation: 867.2 divided by 4 = 216.8

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3 years ago

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Step-by-step explanation:

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3 years ago

Read 2 more answers

If 90 percent of automobiles in Orange County have both headlights working, what is the probability that in a sample of eight au

Marta_Voda [28]

Answer:

$P(X \geq 7) = P(X=7) +P(X=8)$

And we can find the individual probabilities using the probability mass function

$P(X=7)=(8C7)(0.9)^7 (1-0.9)^{8-7}=0.3826$

$P(X=8)=(8C8)(0.9)^8 (1-0.9)^{8-8}=0.4305$

And replacing we got:

$P(X \geq 7) = P(X=7) +P(X=8)=0.3826 +0.4305=0.8131$

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Solution to the problem

Let X the random variable of interest "number of automobiles with both headligths working", on this case we now that:

$X \sim Binom(n=8, p=0.9)$