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3 years ago

a square has a perimeter of 38 inches. We want to know the length of each side. choose the best model for the problem

Mathematics

2 answers:

lianna [129]3 years ago

8 0

Its 9.5inches on each side. im not sure if that was your question :)

galina1969 [7]3 years ago

3 0

What are the models? If I see them I can probably help! :)

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Find m< x (Type the number answer)

pogonyaev

Answer:

Step-by-step explanation:

<u>Law of cosines</u>

In a general triangle, the law of cosines relates the lengths of the sides of the triangle to the cosine of one of its angles.

The law of cosine is expressed as:

$\displaystyle c^{2}=a^{2}+b^{2}-2ab\cos x$

Where a and b are the lengths of two sides of the triangle, x is the angle contained between them, and c is the other side length.

If all side lengths are known, we can solve the above equation for the angle x:

$\displaystyle x =\arccos \left({\frac {a^{2}+b^{2}-c^{2}}{2ab}}\right)$

From the image, we must select a and b as the sides adjacent to angle x in any order. Thus a=17, b=22, c=24. Substituting:

$\displaystyle x=\arccos \left({\frac {17^{2}+22^{2}-24^{2}}{2(17)(22)}}\right)$

Operating:

$\displaystyle x=\arccos \left({\frac {289+484-576}{748}}\right)$

$\displaystyle x=\arccos \left({\frac {197}{748}}\right)$

Using a scientific calculator:

x=74.73°

4 0

3 years ago

Stacy bought a skateboard at a local sporting goods store. The skateboard was on sale for 10% off the original price. The store

yarga [219]

If the original price is x, then x-0.10x=0.9x (which is a 10 percent off discount - 10 percent = 0.10 if you move the decimal spot 2 places over), then 10% of 0.9x is not 0.10x due to that 0.1/0.9=1/9, not 1/10. 1/10 of 0.9 is 0.09, so
0.9-0.09=0.81 of the original price

If the 10% sales tax was added first, it wouldn't matter since you're still getting 10% twice either way

6 0

3 years ago

Find the mode, median, mean and range for this set of data.

Lynna [10]

Answer:

Step-by-step explanation:i dont know your mom

3 0

3 years ago

11.

g100num [7]

Answer:

You spend $55.78 more buying luxury items then store brand items.

Step-by-step explanation:

You have to add up all the items costs for the store branded items. And then you have to add up all the items costs for the luxury branded items. Then you subtract the luxury item costs, from the store brand items and you get, $55.78.

I HOPE THIS HELPED YOU!!!!

7 0

3 years ago

Tju [1.3M]

Answer:

Step-by-step explanation:

Rationalize the denominator of b. So, multiply the numerator and denominator by $\sqrt{x}$