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3 years ago

9

PLEASE HELP

1 answer:

BARSIC [14]3 years ago

3 0

Just do 23 minus 6 and that should be the answer because the y-ccordinate is in the same place

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1 Mr. Ruiz made a map of his ranch on the grid shown below.

tatuchka [14]

Answer: C, 20%

Hope this helps

5 0

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

Help me<br> Verified and certified by me<br> -ayyyyyyy

spayn [35]

Answer:

c. 412.5 cm^2

Step-by-step explanation:

first triangle: 5 x 15 = 75

75/2 = 37.5

rectangle: 15 x 19 = 285

triangle 2: 15 x 12 = 180

180/2 = 90

37.5 + 285 + 90 = 412.5

3 0

3 years ago

Please help and solve; big points<br> 3/2 ∜(2(x-6)^3 )+4=16

daser333 [38]

Answer:

x ≈ 18.7

Step-by-step explanation:

This is a big equation, so let's break it down a bit.

$\frac{3}{2} \sqrt[4]{(2(x-6) ^3 )} +4=16$

Let's start by isolating the radical which is x.

So subtract 4 from both sides :

$\frac{3}{2} \sqrt[4]{(2(x-6) ^3)}$ $=12$

Now multiply both sides by 2 to get rid of the fraction :

$3\sqrt[4]{(2(x-6)^3)} = 24$

Now divide both sides by 3 to get rid of the number out of the poly root :

$\sqrt[4]{2(x-6) ^3}$ $=8$

Now take both sides of the equation to the power of 4 :

$2x^3 - 36x^2+216x-432=4096$

And lastly, solve :

$x = 18.69920$ which is rounded up to $x$ ≈ $18.7$

4 0

3 years ago

Solve: За – 6 = -12 a =

Alisiya [41]

Answer:

a=−2

Step-by-step explanation:

Let's solve your equation step-by-step.

3a−6=−12

Step 1: Add 6 to both sides.

3a−6+6=−12+6

3a=−6

Step 2: Divide both sides by 3.

3a /3 = −6 /3

a=−2

4 0

3 years ago