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Phantasy [73]
3 years ago
6

X + 2y + 5z = -17 2x – 3y + 2z = -16 3x + y - z = 3

Mathematics
1 answer:
Tatiana [17]3 years ago
8 0

Answer:

first one : x=−2y−5z−17

2nd one: x= 3 /2 y−z−8

3rd one: x= −1 /3 y+ 1 /3 z+1

Step-by-step explanation:

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If sin theta = sqrt(2/2), which could not be the value of theta?
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The solution would be like this for this specific problem:

sin(θ°) = √(2)/2 

θ° = 360°n + sin⁻¹(√(2)/2) and θ° = 360°n + 180° − sin⁻¹(√(2)/2)
θ° = 360°n + 45° and θ° = 360°n + 135° where n∈ℤ 

360°*0 + 45° = 45° 
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<span>sin(225°) = -√(2)/2

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3 years ago
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Answer: y=2(x-3)-5

I hope this is good enough:

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Brums [2.3K]

Answer:

9y+2y-5y=6y

Step-by-step explanation:

So we have the expression:

9y+2y-5y

To simplify, simply combine the like terms. Therefore:

9y+2y-5y\\=11y-5y\\=6y

Further notes:

To understand why we can combine like terms in the first place, we just need to use the distributive property. So we have the expression:

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Now, factor out a y from the three terms:

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Do all the operations inside the parenthesis:

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And we moved the y back to the front!

This is the same result as before. When combining like terms, this is what we're essentially doing but without doing the distributive property manually. I hope you understand a bit better on how and why we can combine like terms!

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