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Mashcka [7]
3 years ago
15

HELP me. I will give 100 point!

Mathematics
1 answer:
Kamila [148]3 years ago
3 0

Answer:

2) B) (7, 10,5)

1) D) (8, -1)

Step-by-step explanation:

{y = 2x - 3,5

{x -2y = −14

x - 2[2x - 3,5] = −14

x - 4x + 7 = −14

−3x + 7 = −14

- 7 - 7

__________

−3x = −21

___ ___

−3 −3

x = 7 [Plug this back into both equations above to get the y-coordinate of 10,5]; 10\frac{1}{2} = y

* 10½ = 10,5

_______________________________________________

{y = ¼x - 3

{2x + 4y = 12

2x + 4[¼x - 3] = 12

2x + x - 12 = 12

3x - 12 = 12

+ 12 + 12

_________

3x = 24

__ __

3 3

x = 8 [Plug this back into both equations above to get the y-coordinate of −1]; -1 = y

I am joyous to assist you anytime.

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