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hram777 [196]
3 years ago
9

Four more than a number is half the number

Mathematics
2 answers:
masha68 [24]3 years ago
4 0
The correct answer is y = -8
Alex787 [66]3 years ago
3 0
Let's use y
y + 4 = 1/2 y
2y + 8 = y
y = - 8
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madreJ [45]

Answer:

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Step-by-step explanation:

<u>1st method:</u>

sin(30)=opposite/hypotenuse=√5/x

sin(30)x=√5

x=√5/sin(30)

x=2√5

<u>2nd method:</u>

cos(60)=adjacent/hypotenuse=√5/x

cos(60)x=√5

x=√5/cos(60)

x=2√5

<u>3rd method:</u>

This is a 30-60-90 triangle, so we can multiply the short side, √5, by 2, to get x=2√5

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Dennis_Churaev [7]

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8 0
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Hope it Helps!  :)
Tell me if I'm right. 
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