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stepan [7]
3 years ago
13

1

Mathematics
1 answer:
strojnjashka [21]3 years ago
4 0

Answer:

Step-by-step explanation:

3x - 4y = 13 (1)

2x + y = 5 (2)

——————

3x - 4y = 13

4(2x + y = 5) (2) times 4

——————-

3x - 4y = 13

8x + 4y = 20

——————-

11x = 33

x = 33/11

x = 3

Plug x = 3 in (2):

2(3) + y = 5

6 + y = 5

y = 5-6

y = -1

Thus, x = 3 and y = -1

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Answer:

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Step-by-step explanation:

25^2 = 625

20^2 = 400

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Now 625 = 400 + 225 = 625 so it is choice A.

4 0
3 years ago
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Answer:

<h2>BC = 11.9</h2>

Step-by-step explanation:

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7 0
4 years ago
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7 0
3 years ago
X+y= 1......... 4x+y = -23 <br> What's x and y
Temka [501]
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---------------
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---------------add
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5 0
3 years ago
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