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Anika [276]
3 years ago
8

I NEED HELP!!!

Mathematics
2 answers:
zepelin [54]3 years ago
6 0
In order to answer this one, it's really really really really helpful if you know what the law of cosines says. In fact it's absolutely necessary. The law of cosines says if you know two sides of a triangle and the angle between them then you can use that information to find the length of the third side. In the picture you know the lengths of two sides and you know the angle between them. So you can use the law of cosines to find the length of the third sidethat. That's side AC.
saveliy_v [14]3 years ago
6 0

Answer:

A) AC

Explanation :-

AC is the measurement of acute triangle ABC can you find by direct substitution of the labeled measures in the Law of Cosines

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11111nata11111 [884]
First move the 13 to the left by subtracting 13 from both sides and setting the 'now expression' equal to zero

p² - 12p - 13

Do the opposite of FOIL (for you are trying to find the numbers being FOILed)

p² - 12p - 13

Find the multiplies of the outside numbers/variables, that, when added (or subtracted, will give you the inside expression

p² - 12p - 13
p             -13
p               1

(p - 13)(p + 1)

Set these two expressions equal to zero

p - 13 = 0
p - 13 (+13) = 0 (+13)
p = 13

p + 1 = 0
p + 1 (-1) = 0 (-1)
p = -1


Your answers: p = -1, 13


hope this helps
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