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liraira [26]
3 years ago
14

Solve triangles suing the law of sines

Mathematics
1 answer:
pentagon [3]3 years ago
5 0

Step-by-step explanation:

In your solving toolbox (along with your pen, paper and calculator) you have these 3 equations:

The angles always add to 180°: A + B + C = 180° ...

Law of Sines (the Sine Rule): When there is an angle opposite a side, this equation comes to the rescue. ...

Law of Cosines (the Cosine Rule):

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Pleeeeeese Solve 2x +7-3
Alex
Hey there! :D

2x+7-3

The only thing you can simplify is 7 and 3.

7-3= 4

2x+4 <=== simplified expression

I hope this helps!
~kaikers
3 0
4 years ago
A triangle has a perimeter of 165 cm. The first side is 65 cm less than twice the second side. The third side is 10 cm less than
Dima020 [189]

Answer:

  • first side: 55 cm
  • second side: 60 cm
  • third side: 50 cm

Step-by-step explanation:

The problem statement gives all the side lengths in terms of that of the second side. Let s represent the length of the second side in cm. Then the length of the first side is (2s-65), and the length of the third side is (s-10). The perimeter is the sum of all the side lengths:

  165 = (2s -65) +s +(s-10)

  165 = 4s-75

  240 = 4s

  60 = s . . . . . . . . second side

  2s-65 = 55 . . . . first side

  s-10 = 50 . . . . . . third side

In order, the side lengths are 55 cm, 60 cm, 50 cm.

4 0
3 years ago
Tanya paints the walls of her family room.
galina1969 [7]

Answer:

6.1

Step-by-step explanation:

Surface area of the room = 2(lw + hl + hw)

Where,

l = length = 7 m

w = width = 4 m

h = height = 3 m

Surface area of the room = 2(lw + hl + hw)

= 2(7*4 + 3*7 + 3*4)

= 2(28 + 21 + 12)

= 2(61)

= 122 m²

A 4-L can of paint covers 40 m²

Number of 4-L can of paint needed for 1 coat = 122 m² / 40 m²

= 3.05 4-L can of paint

The walls need 2 coats of paint

Number of 4-L can of paint needed for 2 coats = Number of 4-L can of paint needed for 1 coat × 2

= 3.05 × 2

= 6.1 4-L can of paint

8 0
3 years ago
Testing a conjecture
Nezavi [6.7K]

Answer:

the answer is 7

Step-by-step explanation:

3 0
3 years ago
Factor the polynomial below.
tekilochka [14]
<h3>I'll teach you how to factor 20x^2-45</h3>

----------------------------------------------

20x^2-45

Factor out the common term 5:

5(4x^2-9)

Factor 4x^2-9:

(2x+3)(2x-3)

5(2x+3)(2x-3)

Your Answer Is 5(2x+3)(2x-3)

plz mark me as brainliest :)

8 0
3 years ago
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