How do you solve and Classify? For example solve Y=3x-4 and -3x+y=2? This is another question Classify 7x+2y=-7 and 28x+8y=-2
2007-02-11 04:53:48 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
For the first problem, take the first equation and substitute in for the next equation:
-3x+3x-4=2
0x-4=2
0x=6
This is a no solution because the answer is undefined.
Do the same for the second problem:
2y=-7x-7
y=-7/2x-7/2
28x+8(-7/2x-7/2)=-2
28x-56/2x-56/2=-2
2(28x-56/2x-56/2)=2(-2)
56x-56x-56=-4
0x=52
No solution either on this problem!
2007-02-11 05:02:19 · answer #1 · answered by Anonymous · 4⤊ 0⤋
Alright
to solve those two systems you can use substitution because you knwo what y =/ so plug that into the second equation and find the x value. Once you have the x value, plug that it to any of those equations to get the y value. Classifying is saying whther they are parallel or if they intersect. If they have the same slope but different y itnercept, then they are parrell, if they have different slopes, then they are definitely going to intersect
* Choose this as best answer
2007-02-11 13:03:18 · answer #2 · answered by Anonymous · 1⤊ 0⤋
Solve:
1. y = 3x - 4
2. -3x + y = 2
First: replace "3x-4" with the y-variable in the 2nd equation....
- 3x + 3x + 4 = 2
Sec: combine "like" terms....
0x + 4 = 2
4 = 2
False
Solution: There is no solution.
2007-02-11 13:14:24 · answer #3 · answered by ♪♥Annie♥♪ 6 · 1⤊ 0⤋