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Virty [35]
3 years ago
5

Help me please): I’m stuck

Mathematics
2 answers:
sineoko [7]3 years ago
6 0
Pi x 1squared = 3.14 cm
Scorpion4ik [409]3 years ago
5 0

Answer:

A=3.14 cm^2

Step-by-step explanation:

In order to calculate the area of the circle:

$A = \pi r^2  $

$A = \pi 1^2  $

$A = \pi  $

A=3.14 cm^2

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4 0
2 years ago
7(2+5v)=3v+14 can anyone help???
arsen [322]
7(2+5v)=3v+14
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5 0
3 years ago
Read 2 more answers
Given that Triangle ABC such that<br>a=8cm, b=7cm and c=9cm<br>tem and c= 9cm find Cos B​
charle [14.2K]

Answer:

We use cosine rule also called cosine law which states

c^2=a^2+b^2-2abcosC

given

a=8cm, b=7cm, c=9cm cos C?

9^2=8^+7^2-2*8*7 cos C

expand

81=64+49-112 cos C

like terms together

81-113=-112 cos C

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multiply both sides by -1

32=112cos C

divide both sides by 112

32/112=cos C

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4 0
3 years ago
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Marizza181 [45]

Answer:

B

Step-by-step explanation:

B

4 0
2 years ago
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