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maks197457 [2]
2 years ago
8

Which statements are true about the ordered pair (1,2) and the system of equations? y=-2x+4 7x-2y=3 select all that apply. A.Whe

n (1,2) is substituted into the second equation,the equation is true. B.The ordered pair (1,2) is not a solution to the system of linear equations. C.When (1,2) is substituted into the second equation, the equation is false. D.When (1,2) is substituted into the first equation , the equation is false. E. The ordered pair (1,2) is a solution to the system of linear equations. F. When (1,2) is substituted into the first equation, the equation is true
Mathematics
1 answer:
arlik [135]2 years ago
5 0
Y = -2x + 4
7x - 2y = 3

A. True
B. False
C. False
D. False
E. True
F. True
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Answer:

B. x = 7; AB = 9, AC = 12

Step-by-step explanation:

12/4 = (x + 2)/(x - 4) (similar triangles theorem)

3 = (x + 2)/(x - 4)

Cross multiply

3(x - 4) = (x + 2)

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Collect like terms

3x - x = 12 + 2

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✔️AB = x + 2 = 7 + 2

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✔️AC = (x + 2) + (x - 4) = (7 + 2) + (7 - 4)

AC = 9 + 3

AC = 12

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