5x + 1y + 4z=-1 4x + 6y +9z= -68 9x + 1y + 4z = 27 Select one: (7,-4, -8) (-4,-8, 7) (-8, -7, -4) (-7,4, -8) (-7, -4, -8)

asked Nov 11, 2020 139k views

0 votes

5x + 1y + 4z=-1

4x + 6y +9z= -68
9x + 1y + 4z = 27
Select one:
(7,-4, -8)
(-4,-8, 7)
(-8, -7, -4)
(-7,4, -8)
(-7, -4, -8)

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4 votes

Answer:

[7, -4, -8]

Explanation:

Just simply plug in each choice into the equations to confirm their authenticities.

Kathystehl answered Nov 17, 2020

5.2k points

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