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gayaneshka [121]
3 years ago
10

HELP!! TRIG LAW OF COSINES

Mathematics
1 answer:
vivado [14]3 years ago
4 0

Answer:

C ≈ 95.7°

Step-by-step explanation:

Law of cosines:

c² = a² + b² − 2ab cos C

where a, b, and c are the sides of the triangle, and C is the angle opposite of side c.

9² = 5² + 7² − 2(5)(7) cos C

81 = 25 + 49 − 70 cos C

81 = 25 + 49 − 70 cos C

7 = -70 cos C

-1/10 = cos C

C ≈ 95.7°

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What is the prduct of 33 and 6925?
liubo4ka [24]

Answer:

228525-Look below for steps:)

Step-by-step explanation:

Step 1:

6925

*   33

______

Step 2:

5*3=15

carry the one

3*2+1=7

9*3=27

carry the 2

6*3+2=20

SO your first number is 20775 but we are NOT done yet!

add a zero below 5

5*3=15

carry the one

3*2+1=7

9*3=27 carry the 2

then 6*3+2=20

then add 207750+20775

which equals....

228525

so 228525 is your answer!!!

<em>I really do hope this made sense!</em>

<em>Have a great day!</em>

<em>- Hailey: D</em>

<em>(NOTHING IS COPIED AND PASTED!!!!!)</em>

3 0
3 years ago
A stretched spring has a length of 12 inches when a weight of 2 lbs is attached to the spring. The same spring has a length of 1
Advocard [28]
The way I figured this one out was saying that if it takes 2lbs to stretch it to 12 inches and 5lbs to stretch to 18 inches that means that 3 additional pounds = 6 inches. Therefore, each additional pound is 2 inches. We know already that with 2 lbs it was 12 inches in length and we can also say that 2 lbs = 4 inches. So subtract 4 from 12 and you end up with the answer of 8 inches. 
8 0
3 years ago
How is the graph of Y=√X) -5 translated from the graph of √X ?
Tom [10]
Shifted 5 units to the left.
8 0
3 years ago
17n + 8 =76 whats n ?​
liubo4ka [24]

Answer:

4

Step-by-step explanation:

Step 1: Subtract 8 from both sides.

17n+8−8=76−8

17n=68

Step 2: Divide both sides by 17.

17n/17

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Answer:4

7 0
3 years ago
Read 2 more answers
Someone pls help me I will make you Brainly
AURORKA [14]

Answer:

it should be step 2

Step-by-step explanation:

8 0
2 years ago
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