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3 years ago

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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