1. 5x+2y=8
8x+7y=9 is called a what _______ of linear equations
2. solve the following system
x=9/4y +5
4x-9y=23
3. 8x+7y=9
7x-8y=3
what is the line perpendicular parallel or neither
2007-05-12 17:55:03 · 5 answers · asked by Eclipse 5 in Science & Mathematics ➔ Mathematics
1. system
2. 4(9/4y+5)-9y=23 ( I just substituted x=9/4y+5)
multiplying this out yields: 9y+20-9y=23
or 20=23 therefore, there is no solution for this system.
3. They are perpendicular
2007-05-12 18:02:09 · answer #1 · answered by bruinfan 7 · 0⤊ 0⤋
1.system
2. 4(9/4y+5)-9y=23
9y+20-9y=23
20 does not equal 23
.: no solution
3.7y=-8x+9 eq.1
-8y=-7x=3 eq.2
y=-8/7.....eq.1
y=7/8....
perpendicular
2007-05-12 18:07:53 · answer #2 · answered by shorteballer24 2 · 0⤊ 0⤋
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2016-12-11 07:58:48 · answer #3 · answered by jaffe 4 · 0⤊ 0⤋
1. if you can't get this then you deserve to fail the class
2. 4(9/4y+5)-9y=3
9y+20-9y=3
20=3
no real solutions
3. neither
2007-05-12 18:02:18 · answer #4 · answered by americanmimeboy 4 · 0⤊ 0⤋
1. simultaneous equation
2007-05-12 18:14:45 · answer #5 · answered by loally 2 · 0⤊ 0⤋