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Nikitich [7]
3 years ago
14

I will give brainliest if you answer this question !!!

Mathematics
1 answer:
yanalaym [24]3 years ago
7 0

Answer:

A) 2

Step-by-step explanation:

Start off with the given information. The question states that the x-int. is 4, so you should recognize that there is a point at (4,0). Plug the point into the equation.

k(4) + 2(0) + 8 = 0

Now simplify the equation.

4k + 0 + 8 = 0

Isolate the variable, make sure it's on its own side.

4k = 8

Now get the k by itself to solve the equation. Divide both sides by 4.

k = 2

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Divide 81 ft in the ratio 5 :4
Mumz [18]

Answer:

Rr = 51 : 68

Step-by-step explanation:

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3 years ago
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How many feet are in 13 miles, 176 yards? Enter only the number. Do not include units.
hammer [34]

Answer:

69,168

Step-by-step explanation:

1 mile = 5280 ft

13 miles · 5280 ft = 68,640 ft

1 yd = 3 ft

176 yds · 3 ft = 528 ft

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3 years ago
The librarian purchased 22 copies of a best-selling book for $385.66.
kow [346]

Answer:

$17.53

Step-by-step explanation:

$385.66 divided by 22 equals the how much each book cost

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3 years ago
New York City is the most expensive city in the United States for lodging. The mean hotel room rate is per night (USA Today, Apr
kow [346]

Answer:

P(X

Step-by-step explanation:

Assuming a mean of $204 per night and a deviation of $55.

a. What is the probability that a hotel room costs $225 or more per night (to 4 decimals)?

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean"

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Let X the random variable that represent the cost per night at the hotel, and for this case we know the distribution for X is given by:

X \sim N(204,55)  

Where \mu=204 and \sigma=55

And let \bar X represent the sample mean, the distribution for the sample mean is given by:

\bar X \sim N(\mu,\frac{\sigma}{\sqrt{n}})

We are interested on this probability

P(X>225)

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(X>225)=P(\frac{X-\mu}{\sigma}>\frac{225-\mu}{\sigma})

=P(Z>\frac{225-204}{55})=P(Z>0.382)

And we can find this probability on this way:

P(Z>0.382)=1-P(Z

8 0
3 years ago
The graph shows Linda's math scores versus the number of hours spent doing math homework.
xz_007 [3.2K]
Answer=A

Let's write the an equation in slope intercept for for the line.

y-intercept=10

slope=rise/run=15/2=7.5

equation:

y=mx+b
y=7.5x+10

Solve for x=7

y=7.5(7)+10
y=52.5+10
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Answer=A
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3 years ago
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