Determine whether the system consistent or inconsistent

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cmarva

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Jul 7, 2006
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Determine if system is consistent or inconsistent:

1) x + 2y = 6
. .x + 2y = 3

2) x - 2y = 3
. .2x - 4y = 7

3) 3x + 8y = 28
. .-4x + 9y = 1

Determine whether each ordered pair is solution of the system of equation

4) x + 2y = 9
. .-2x + 3y = 10

. .(a) (1, 4)
. .(b) (3, -1)

5) 5x - 4y = 34
. .x - 2y = 8

. .(a) 0, 3)
. .(b) (6, -1)

6) 4x - 5y =12
. .3x + 2y = -2.5

. .(a) (8, 4)
. .(b) (1/2, -2)

7) 2x - y = 1.5
. .4x - 2y = 3

. .(a) (0, -3/2)
. .(b) (2, 5/2)
 
For (1) through (3), what method(s) are you supposed to use for finding the answer?

For (4) through (7), plug in the given x- and y-values, and see if they work in the system.

Eliz.
 
for the questions (1) through (3) Determine whether each ordered pair is a solution of the system of the system of equations.
 
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