47.
2y = -10 + x ----> y = (1/2)x - 5
-4y = 2x + 20 ---> y = (-1/2)x - 5
one slope is 1/2 then other is -1/2, so NOT parallel
your best way is to rewrite in the form
y = mx + b like I did above.
Why are you unsure about the first one ?
40. The graph of the following system yields perpendicular lines.
x + 2y = -10
-4y = 2x + 20
(True?)
47. The graph of the following system yields parallel lines.
2y = -10 + x
-4y = 2x + 20
(True)
48. The graph of the following system yields parallel lines.
x - 2y = 1
y = -3x + 10
(False)
Are these correct?
Thanks
-MC
2 answers
Thanks; are the other 2 correct?
-MC
-MC