2 years ago

Please help I’ll give brainliest

Mathematics

2 answers:

AlekseyPX2 years ago

8 0

It’s the 2nd on I’m pretty sure because it says decimal

valentina_108 [34]2 years ago

6 0

Answer:

last option

Step-by-step explanation:

7 is the most significant value

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Find the cosine of angle B.

Alexandra [31]

$\boxed { \text {Cosine Rule : } a^2 = b^2 + c^2 - 2bc \cos(A) }$

9² = 12² + 15² - 2 (12) (15) cos (B)

81 = 144 + 225 - 360 cos(B)

81 = 369 - 360 cos (B)

360 cos (B) = 369 - 81

360 cos (B) = 288

cos (B) = 0.8

Answer: Cosine B = 0.8

$\boxed { \text {Cosine Rule : } a^2 = b^2 + c^2 - 2bc \cos(A) }$

12² = 15² + 9² - 2 (15)(9) cos (A)

144 = 225 + 81 - 270 Cos A

144 = 306 - 270 Cos A

270 Cos A = 162

Cos A = 3/5 or 0.6

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2 years ago

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IrinaVladis [17]

Answer:

Its obtuse

Step-by-step explanation:

one angel is above 90 degrees.

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2 years ago

What’s the answer (no link I give brainly)

mixer [17]

Answer:

I belive it is C

Step-by-step explanation:

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2 years ago

( 2x + 1 ) + ( 3x+2 ) =

MrRa [10]

Answer: 5x+3

Let's go over this problem step by step:

First, you need to combine all the line terms.

2x + 1 + 3x + 2

Next, you get this equation:

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2x and 3x is 5x. 1 and 2 is 3.

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Alisiya [41]

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