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Westkost [7]
2 years ago
10

Area= Help me please!! Thanks :)

Mathematics
1 answer:
Savatey [412]2 years ago
8 0

Answer:

80π

Step-by-step explanation:

Circle O with radius IO:

large radius = IO = 12 = R

Circle O with diameter JK

IJ = JK = KL = 2 × IO = 24

IJ = JK = KL = 24/3 = 8

small radius = 8/2 = 4 = r

The shaded area is a semicircle of radius 12 minus a semicircle of radius 4 plus two semicircles of radius 4.

That is the same as

1 semicircle of radius 12 plus 1 semicircle of radius 4

A = πR²/2 + πr²/2

A = π(12² + 4²)/2

A = 160π/2

A = 80π

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kifflom [539]

Answer:

19

Step-by-step explanation:

7 0
3 years ago
Solve using elimination <br><br> y = 5x+4<br><br> y = 2x+7 <br><br> Show work plz
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Answer and Step-by-step explanation:

5x + 4

2x + 7

Multiply 5x + 4 by 2, and 2x + 7 by 5.

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3 years ago
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Setler [38]
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8 0
3 years ago
Read 2 more answers
In the equation below, for what value of c does x = 4?<br> 1 / (2x + 4) = 3x-c
rodikova [14]

Answer:

Option D.

Jenn's answer is not correct. She got it substituting c=4 into the equation and solving for "x".

Step-by-step explanation:

Given the following equation:

\frac{1}{2}(2x + 4) = 3x-c

Since you need that x=4, you hace to substitute that value into the equation:

\frac{1}{2}(2(4) + 4) = 3(4)-c

Now you need to solve for "c":

\frac{1}{2}(8 + 4) = 12-c\\\\\frac{12}{2}= 12-c\\\\6=12-c\\\\c+6=12\\\\c=12-6\\\\c=6

Therefore for a  a value of c=6, you get x=4

Then, the you can identify that the correct answer is the one given in the Option D.

Jenn made a mistake, because she substituted c=4 into the equation and then solve for "x":

\frac{1}{2}(2x + 4) = 3x-(4)\\\\x+2=3x-4\\\\2+4=3x-x\\\\6=2x\\\\\frac{6}{2}=x\\\\x=3

3 0
3 years ago
A wire 27 ft long is cut into two pieces. Each piece is bent into the shape of a square. The perimeter of the larger square is t
Alexus [3.1K]

Answer:

Perimeter of the smaller square = 9 ft

Perimeter of the larger square = 18 ft

Step-by-step explanation:

Let

Perimeter of the smaller square = x

The perimeter of the larger square is twice the perimeter of the smaller square.

Perimeter of the larger square = 2x

Total Length of the piece of wire = 27 ft

Total = smaller + larger

27 = x + 2x

27 = 3x

x = 27/3

x = 9 ft

Perimeter of the smaller square = x

= 9 ft

Perimeter of the larger square = 2x

= 2(9)

= 18 ft

3 0
2 years ago
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