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kotykmax [81]
3 years ago
7

BRAINLIEST TO CORRECT

Mathematics
2 answers:
xeze [42]3 years ago
6 0

Answer:

Step-by-step explanation:

49/9 is the correct answer

tensa zangetsu [6.8K]3 years ago
5 0

Answer:

49/9

Step-by-step explanation:

5*9= 45

45+4= 49

Hope this helps! :)

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X+y= -9<br> x+2y= -25<br><br> According to the system of equations above, what is the value of y?
Varvara68 [4.7K]
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6 0
3 years ago
ΔABC has three sides with these lengths: AB = 9, BC = 40, and CA = 41. What is the value of cos C?
kotykmax [81]

Answer:

cos(C) =\frac{40}{41}\\\\cos(C)=0.976

Step-by-step explanation:

To find the cos (C) we must use the cosine theorem.

The cosine theorem says that:

c^2 = a^2 +b^2 -2abcos(C)

In this case:

c=AB = 9

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So

9^2 = 40^2 +41^2 -2(40)*(41)cos(C)

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cos(C) =\frac{40}{41}\\\\cos(C)=0.976

7 0
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