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Advocard [28]
3 years ago
15

Please help me it’s so important :(((

Mathematics
2 answers:
Ilia_Sergeevich [38]3 years ago
7 0
C,D and F are all true
Darina [25.2K]3 years ago
3 0

Answer:

C, D and F are true

Step-by-step explanation:

The DCB triangle is isosceles, so it means the angles D and B are the same and as the angle C is 90°, B and C need to be 45° (because the sum of the internal angles of a triangle is always 180°). The sin(B) = sin(C) = sqrt2/2 and the tan(B) = tan(C) = 1

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3 years ago
A farmer wishes to fence a rectangular area behind his barn. The barn forms one end of the rectangle and the length of the recta
Semenov [28]
1. The formula for calculate the perimeter of a rectangle, is:

 P=2L+2W

 P is the perimeter of the rectangle (P=320 feet).
 L is the lenght of the rectangle.
 W is the width of the rectangle.
<span>
 2. The problem says that the length of the rectangle is three times the width, so you have:
</span>
 L=3W

 3. When you substitute L=3W and P=320, into P=2L+2W, you obtain:

 P=2L+2W
 320=2(3W)+2W
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 W=320/8
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 4. The barn forms one end of the rectangle. Therefore the linear feet of fence (x) is:

 x=P-W
 x=320 feet-40 feet
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<span>
 How many linear feet of fence must he buy?
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 The answer is: 280 feet
5 0
3 years ago
Renee is playing a game online. If she gets a total of 25 points, she will have a new
Mashutka [201]

Answer:

20 points

Step-by-step explanation:

key words: difference

Take the amount of points she has and subtract what she has

25-5

4 0
4 years ago
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