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3 years ago

A rectangle has a length of 11 feet and a perimeter of 38 feet. what is the width, in feet, of the rectangle?

1 answer:

5 0

We KNOW the perimeter is 38 & we KNOW the length on ONE side is 11, therefore 11 + 11 = 22 AND 38 - 22 = 16, THUS 16/2 = 8 feet THE ANSWER IS 8 feet

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What is the same as 1 cm to 1 km

lana [24]

Pretty easy little one hehe, hoped this helped 1m=1000mm

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3 years ago

A consumer survey indicates that the average household spendsμ= $185on groceries each week. The distribution of spending amounts

Vitek1552 [10]

Answer:

$P(X>200)=P(\frac{X-\mu}{\sigma}>\frac{200-\mu}{\sigma})=P(Z>\frac{200-185}{25})=P(Z>0.6)$

And we can find this probability using the complement rule and with the normal standard table or excel:

$P(Z>0.6)=1-P(z$

Step-by-step explanation:

Previous concepts

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".

Solution to the problem

Let X the random variable that represent the average household spent of a population, and for this case we know the distribution for X is given by:

$X \sim N(185,25)$

Where $\mu=185$ and $\sigma=25$

We are interested on this probability

$P(X>200)$

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:

$P(X>200)=P(\frac{X-\mu}{\sigma}>\frac{200-\mu}{\sigma})=P(Z>\frac{200-185}{25})=P(Z>0.6)$

And we can find this probability using the complement rule and with the normal standard table or excel:

$P(Z>0.6)=1-P(z$

7 0

3 years ago

What is the sum of all the angles that are labeled?

Tasya [4]

Based on the information provided, the sum of all the labeled angles is 235° (option b).

<h3>How to calculate the sum of all labeled angles?</h3>

To calculate the sum of all the labeled angles we must add the different values of each labeled angle as shown below:

80° + 92° + 40° + 23° = 235°

According to the above, it can be inferred that the correct option is B because the result of the sum of the values coincides with this sum.

Learn more about degrees in: brainly.com/question/1217620

#SPJ1

4 0

3 years ago

Find the value of x <br><br> Look at the picture^^<br><br> Answer with work please I need help???

Serjik [45]

Step-by-step explanation:

${30.5}^{2} = {x}^{2} + {19.1}^{2} \\ 930.25 = {x}^{2} + 364.81 \\ {x}^{2} = 930.25 - 364.81 \\ {x}^{2} = 565.44 \\ x = \sqrt{565.44} \\ \\ x = 23.78$

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3 years ago

Solve for y:<br><br> 2y-2=4y+2

Alex73 [517]

Answer:

2y-4y=2+2.

-2y=4.

y= -2.

7 0

3 years ago

Read 2 more answers