SOLUTION: I would appreciate any help to the following problem #25. Determine whether each pair of lines is parallel, perpendicular, or neither.
x + y = 5
x - y = 1
Thank you.
Algebra.Com
Question 30202: I would appreciate any help to the following problem #25. Determine whether each pair of lines is parallel, perpendicular, or neither.
x + y = 5
x - y = 1
Thank you.
Answer by longjonsilver(2297) (Show Source): You can put this solution on YOUR website!
x + y = 5 --> y = -x + 5
x - y = 1 --> y = x - 1
Written in this form, the coefficient of x is the gradient... we have -1 and +1. They are not parallel.
If (grad1)*(grad2) = -1 then the lines are perpendicular.
-1*1 is -1... so the 2 lines are perpendicular.
jon.
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