victoria72001 victoria72001

20-05-2017
Mathematics

contestada

How many solutions does the system of equations have?
3x+12y=20
y=-1/4x+5/3
A) one
B) two
C) infinitely many
D) none

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Genius2017 Genius2017

20-05-2017

The answer is d) none because substituting -1/4x + 5/3 for y in the first equation gives 3x - 3x + 5/3 = 20 so 5/3 = 20 which is not true.

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