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Lelu [443]
3 years ago
13

In triangle ABC, a = 3, b = 5, and c = 7. Find the approximate value of angle A.

Mathematics
1 answer:
Lady bird [3.3K]3 years ago
6 0

Answer:

21.8° (22° to the nearest degree)

Step-by-step explanation:

Using cosine law:

a² = b² + c² - 2bc(cosA)

3² = 5² + 7² - 2(5)(7)cosA

cosA = 13/14

A = 21.7867893

Approximately angle: 22°

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Maksim231197 [3]

Answer:

D. x=1

Step-by-step explanation:

Image can be rewritten as 3x + 6 = 9.

Solve for x.

3x +6 = 9

Isolate x by subtracting 6 from both sides.

3x = 3

Get rid of the 3 by dividing by 3 on both sides.

x = 1

Hope this helped.

8 0
2 years ago
mrs lim had some money she spent 4/7 of it on necklace and 1/6 of her remainig money on a bracelet she then had $990 left how mu
zmey [24]

Answer:

she spent $1782

Step-by-step explanation:

first we have to find out her total money then minus 990

to get that 990 /5 then multipliedby 6 is 1188

1188 over 3 then times by 7 is 2772

2772 is the total amount of money she had. minus what she had left which is 990 she has spent 1782 dollars

4 0
2 years ago
If you were to roll the dice one time what is the probability it will not land on 6
Naddika [18.5K]

Answer:

The chances that the dice will not land on 6 is 5/6.

4 0
3 years ago
Solve x^2 = 196 and c^3 = 216.
Vika [28.1K]
The answer is: B. x=+_14; c=6

Hope this helps, happy holidays!! :p


8 0
3 years ago
Read 2 more answers
Sonia used $12.50 to buy a new journal. She has $34.25 left in her savings account. How much money did Sonia have before she bou
natali 33 [55]
  1. X-12.50=34.25
  1. Add 12.50 to both sides
  2. X=46.75
3 0
3 years ago
Read 2 more answers
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