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Dollar
Dollar asked in Science & MathematicsMathematics · 8 years ago

EMERGENCY!! HELP!! PLEASE!! MATH QUESTION!!?

The linear system

−x−7y+8z=−14

9x−6y+3z=−30

8x−13y+11z=−39

has how many solutions?

Options:

a) 2

b) infinitely many

c) 1

d) none

2 Answers

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  • ?
    Lv 4
    8 years ago

    D - NONE

    subtract (2) from (3) gives

    -x -7y + 8z = -9

    the same LHS as (1) but different RHS , that gives -14 = -9

    and that is NOT true

  • Dan
    8 years ago

    d) none

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