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beserkerbradley7985
19.08.2019 •
Mathematics
Determine whether the following pairs of lines are parallel,perpendicular,or neither.
y=2x+1 2x+y=7
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Ответ:
--> Parallel lines have equal slopes.
--> Perpendicular lines have negative reciprocal slopes.
(One slope = - [ 1/the other slope ]
The question gives us two lines:
#1). y = 2x + 1
#2). 2x + y = 7
The first equation is in nice slope-intercept form, and we can see
right away that the slope of its graph is 2 .
The second equation is not in slope-intercept form, so we need to
massage it slightly before we can spot the slope of its graph.
2x + y = 7
Subtract 2x from each side: y = -2x + 7 . <== slope-intercept form.
Slope = -2 .
Now we know both slopes.
#1). Slope = 2
#2). Slope = -2
Are the slopes equal ? I don't think so. 2 is not equal to -2 .
The lines are not parallel.
Are the slopes negative reciprocals ? I don't think so.
2 is not equal to -[ 1/(-2) ].
The lines are not perpendicular.
Ответ:
C
Step-by-step explanation: 24x 786 is really 18,864