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zavuch27 [327]
2 years ago
10

Sin2A-sin2B+sin2C=4cosA×sinB×cosC​

Mathematics
1 answer:
Hoochie [10]2 years ago
3 0

Answer:

Step-by-step explanation:

mark as brainliest!!! this is not a video i sent a screenshot instead

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4x+(x-y/8)=17 and 2y+x-(5y+2/4)=2 by using elimination method
vladimir2022 [97]

Answer:

x=811/238, y=36/119. (811/238, 36/119).

Step-by-step explanation:

4x+(x-y/8)=17

2y+x-(5y+2/4)=2

-----------------------

4x+x-y/8=17

5x-y/8=17

40x-y=136

y=40x-136

------------------

2y+x-5y-2/4=2

2y-5y+x-1/2=2

-3y+x=2+1/2

-3y+x=4/2+1/2

-3y+x=5/2

-3(40x-136)+x=5/2

-120x+408+x=5/2

-119x=5/2-408

-119x=5/2-816/2

-119x=-811/2

119x=811/2

x=(811/2)/119

x=(811/2)(1/119)=811/238

y=40(811/238)-136

y=16220/119-136

y=36/119

x=811/238, y=36/119.

4 0
3 years ago
What fraction is equivalent to 2/7, 2/9, 14/21, 16/56, 5/7, 24/35
oksano4ka [1.4K]
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Given lines L1 and L2 and L1 = (1-a)x-y and L2= 6x+ay =9 find the value of a if L1 and L2 are parallel then L1 and L2 are perpen
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Answer:

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I need help with number 11 ASAP!
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132 inches is the correct answer.
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