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Andrej [43]
3 years ago
11

SEND FIRST AND CORRECT AND GET 5 STARS AND THANKS

Mathematics
2 answers:
Rama09 [41]3 years ago
6 0
-779 should be the answer
Svetlanka [38]3 years ago
4 0
"A" equals -779 hope I helped :)
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I don't understand???? I'll give the brainliest!!!!!
olasank [31]

Answer:

<h2>37</h2>

Option A is the correct option.

Step-by-step explanation:

{a}^{2}  +  {b}^{2}  - 2ab \:  \cos \: c \:  =  {c}^{2}  \\ a = 4 \\ b = 5 \\ c = 2 \\  \\ 2ab \: cos \: c =  {a}^{2}  +  {b}^{2}  -  {c}^{2}  \\  \:  \:  \:  \:  \:  \:  \:  \:  =  {(4)}^{2}  +  {(5)}^{2}  -  {(2)}^{2}  \\  \:  \:  \:  \:  \:  \:  \:  \:  = 16 + 25 - 4 \\  \:  \:  \:  \:  \:  \:  = 41 - 4 \\  \:  \:  \:  \:  \:  \:   = 37

Hope this helps...

Good luck on your assignment...

6 0
3 years ago
Please help with this question?
lesya [120]

Answer:42, 3, 2, 15

Step-by-step explanation:

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Mandarinka [93]
(1.2)(-3.5)(2.7)(-0.8
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Answer:

(4,1)

Step-by-step explanation:

If you have any questions about the way I solved it, don't hesitate to ask me in the comments below :)

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