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3 years ago

I REALLY need help. I don't understand this at all and I need to pass. I suck at geometry.

Mathematics

2 answers:

Lisa [10]3 years ago

8 0

Answer: A=27 $\pi$

ser-zykov [4K]3 years ago

3 0

Either as aforementioned above, or use $\bf \textit{Area of a Ring}\\\\
A=\pi (R^2-r^2)\qquad 
\begin{cases}
R=\textit{longer radius}\\
r=\textit{shorter radius}
\end{cases}$

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Three merchants find a purse lying in the road. The first asserts that the discovery would make him twice as wealthy as the othe

Angelina_Jolie [31]

Answer: the system of equation would be :

A + Y = 2 (B+C)

B + Y = 3B

C + Y = 5C

the three merchants would have 10 dollars, 10 dollars, and 5 dollars respectively

Step-by-step explanation:

before finding the purse, lets assume the wealth of the 3 merchants were as follows:

first merchant = A dollars

second merchant = B dollars

third merchant = C dollars

lets assume the purse contained Y dollars

After finding the purse they all claimed they would have the following:

first merchant said adding the money in the purse to his wealth would make him twice as rich as the other two combined : A + Y = 2 (B+C)

second merchant said adding the money in the purse to his wealth would make his wealth triple : B + Y = 3B

third merchant said adding the money in the purse to his wealth would make his wealth increase five folds : C + Y = 5C

third merchant = C dollars

therefore the system of equations to represent the problems are:

A + Y = 2 (B+C)

B + Y = 3B

C + Y = 5C

2. now when the money in the purse is 20 dollars (Y= 20 dollars ), from the equations above

the second merchant will have :

B + Y = 3B

B + 20 = 3B

3B - B = 20

2B = 20

B = 10 dollars

the third merchant will have :

C + Y = 5C

C + 20 = 5C

5C - C = 20

4C = 20

C = 5 dollars

the first merchant will have :

A + Y = 2 (B+C)

A + 20 = 2 ( 10 + 5)

A = 2 (15) - 20

A = 30 - 20

A = 10 dollars

8 0

4 years ago

What does k equal in K + 8\5 = 1k

nataly862011 [7]

66 is the answer. okkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk

8 0

3 years ago

How much is 12.16% in millions???

horsena [70]

Answer:

12160000.

Step-by-step explanation:

i think this is right but... i did 12.16 *1,000,000 to get my answer.

6 0

3 years ago

The measure of the exterior angle of the triangle is ___

mr_godi [17]

Answer: 114°

Step-by-step explanation:

<h2>Concept: </h2>

Here, we need to know the idea of the "Exterior Angle theorem".

<u>The exterior angle theorem</u> states that the measure of an exterior angle of a triangle is equal to the sum of the measures of the two opposite interior angles of the triangle.

If you are still confused, then refer to the attachment below for a graphical explanation.

<h2>Solve:</h2>

Given

24 + (2x + 18) = 3x + 6

Put like terms together

24 + 18 + 2x = 3x + 6

Combine like terms

42 + 2x = 3x + 6

Subtract 6 on both sides

42 + 2x - 6 = 3x + 6 - 6

36 + 2x = 3x

Subtract 2x on both sides

36 + 2x - 2x = 3x - 2x

x = 36

Exterior angle = 3x + 6 = 3(36) + 6 = 114°

Hope this helps!! :)

Please let me know if you have any questions

4 0

4 years ago

Read 2 more answers

To mix plaster for a dental model, 35 mL of water is used for 100g of plaster. How many mL of water should be used for 250g of p

laila [671]

Okay, here we have this:

Considering the provided information, we are going to calculate the requested value, so we obtain the following rule of three:

$\begin{gathered} \frac{x}{35mL\text{ of water}}=\frac{250g\text{ of plaster}}{100g\text{ of plaster}} \\ x=\frac{250g\text{ of plaster}}{100g\text{ of plaster}}\cdot35mL\text{ of water} \end{gathered}$

Solving for x:

$\begin{gathered} x=2.5\cdot35mL\text{ of water} \\ x=87.5mL\text{ of water} \end{gathered}$

Finally we obtain that 87.5mL of water should be used for 250g of plaster.

3 0

1 year ago