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aleksandr82 [10.1K]
3 years ago
6

2x-y=5solve the equation for y

Mathematics
1 answer:
Taya2010 [7]3 years ago
7 0
2x-y=5 Subtract 2x from both sides -y=-2x+5 Multiply everything by -1 y=2x-5 would be your answer
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A room 9m wide has a span roof which slopes at 34 degrees on one side and 44 degrees on the other. Find the length of the roof s
ivann1987 [24]

Answer:

Slope sides are;

5.07 m and 6.39 m

Step-by-step explanation:

I've attached a drawn diagram showing a triangle representing the roof slopes and I have attached it.

From the image attached, the missing angle is θ.

From sum of angles in a triangle,

θ = 180 - (44 + 34)

θ = 102°

Now, a & b represent the slopes of the roof.

Thus, using law of sines which is that;

a/sin A = b/sin B = c/sin C, we can solve as follows;

a/sin 34 = 9/sin 102

a = (9 × sin 34)/sin 102

a = (9 × 0.5512)/0.9781

a = 5.07 m

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b = (9 × sin 44)/sin 102

b = (9 × 0.6947)/0.9781

b = 6.39 m

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3 years ago
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Keith_Richards [23]

The second option, 3/4 = 9/12 is a proportion.

Hope this helped! :D

8 0
3 years ago
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Answer:

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