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faust18 [17]
3 years ago
14

(50 points)(please make sure you know what you're doing)(absurd answers will be reported)

Mathematics
1 answer:
Tatiana [17]3 years ago
7 0

Answer:

  see below

Step-by-step explanation:

Putting each equation in standard form is a good start.

1. Divide the first equation by 2. Divide the second equation by -5.

  • x +2y = 2
  • x - y = -1

2. Divide the first equation by 2; multiply the second by -1.

  • x +2y = 2
  • 3x -y = 1

3. Divide the first equation by 2.

  • x +2y = 2
  • 7x +5y = -1

4. Divide the first equation by 2.

  • x +2y = 2
  • 7x -y = 5

5. Divide the first equation by 2.

  • x +2y = 2
  • 7x -y = -1
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6 0
4 years ago
The angles of a triangle add up to 180 degrees.
Alex_Xolod [135]

Answer:

33°

Step-by-step explanation:

We were given that:

1- The angles of a triangle add up to 180 degrees

2- The second angle is 15 degrees larger than the smallest angle

3- The third angle is 3 times as big as the smallest angle

So, first of all, let's call the smallest angle x.

the second angle will be (x + 15°) since it is 15 degrees greater than the smallest angle

and the third will be 3x, since it is 3 times bigger than the smallest angle.

With the information we have, we can form an equation!

180° = x + (x+ 15°) + 3x

180° = 5x + 15°

180° - 15° = 5x + 15° - 15°

165° = 5x

165°/5 = 5x/5

33° = x

therefore, the smallest angle measures 33° degrees, the second angle measures 48° and the third angle measures 99°.

99° + 33° + 48° = 180°

so it is safe to say this answer is correct!

8 0
3 years ago
Please help!!!!!!!!!!
Basile [38]

Answer:

1-c

2-b

3-a

Step-by-step explanation:

1. 7y=14

y=2

-7y=-14

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so the equation has one solution

2. 0=0

so the equation has infinite solution

3. 0=2 false

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