4/9 x + y/2 = 2
- 9/8 x + y = -4
Determine whether the graphs of the equations are parallel lines, perpendicular lines, or neither.?
2016-02-15 3:50 pm
回答 (2)
2016-02-15 3:54 pm
It is clearer to write in this way:
y=-8/9x+4
y=9/8x-4
notice that -8/9 times 9/8 equals -1
so they are perpendicular
y=-8/9x+4
y=9/8x-4
notice that -8/9 times 9/8 equals -1
so they are perpendicular
2016-02-15 3:57 pm
8x + 9y = 36
y = - (8/9) x + 4
-9x + 8y = - 32
y = (9/8) x - 4
m1 x m2 = - 1
Thus lines are perpendicular
y = - (8/9) x + 4
-9x + 8y = - 32
y = (9/8) x - 4
m1 x m2 = - 1
Thus lines are perpendicular
收錄日期: 2021-04-21 16:53:29
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160215075014AAI2D2a