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bearhunter [10]
3 years ago
7

NEED HELP NOW 25 POINTS!!!!!!

Mathematics
2 answers:
antiseptic1488 [7]3 years ago
7 0
4) 62.8 cm^2
5) It is quadrupled

sergij07 [2.7K]3 years ago
6 0
First you have to find the area of the smaller inner circle:
A=<span>πr^2
A=</span><span>π4^2
A=</span><span>π16
A= 3.14 x 16
A= 50.24

Then, you have to find the area of the whole circle:
</span>A=πr^2
A=π6^2
A=π36
A= 3.14 x 36
A= 113.04
<span>
Now, you simply subtract 50.24 from 113.04 to get 62.8

</span>
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2 years ago
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2 years ago
Lisa had $4.26 in her purse. She bought some school supplies for $2.75. How much money does Lisa have left?
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Step-by-step explanation:

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7 0
4 years ago
the perimeter of a square is equal to the perimeter of an equilateral triangle the length of a side of the square is given by th
diamong [38]

Answer:

x = 3

Step-by-step explanation:

We are told that the length of a side of the square is x.

Now, perimeter of square = 4 × side length

Perimeter of square = 4x

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Thus, perimeter of triangle = 3(x + 1)

Since we are told that the perimeter of the square is equal to that of the equilateral triangle. Thus;

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5 0
3 years ago
Dr bell donated 2(3x+60) dollars to the salvation army, 5x dollars to the church and $100 to a sport shop. If he donated a total
Andreyy89
He donated $285 to the salvation army.
The first thing to do is solve for "x". The equation would be {2(3x+60)}+5x+100=550. 
Then, you would multiply 2 with 3x and 60. Your new equation would be 5x+120+5x+100=550. 
Next, you would combine like terms. This means to combine the terms that are similar. In this case, it would be the whole numbers and the numbers with the variable. Your new equation would be 10x+220=550. 
After that, you subtract 220 on both sides of the equal sign. This makes the equation 10x=330. 
Then, you divide ten on both sides of the equal sign, giving you x=33.
The second things to is replace the x with 33. The amount for the salvation army is 5x+120. Replacing 33 with x, your final equation will be 165+120=$285.

Have a great day!!! :)
5 0
4 years ago
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