SAT官方每日一题附答案和解析[数学](2019年7月24日)
日期:2019-07-24 07:52
(单词翻译:单击)
每日一题
Mathematics
y=x+a
y=-x+a
In the system of equations above, a is a positive constant. If the system is graphed in the xy-plane, which of the following best describes the two lines?
A.Both equations represent the same line.
B.The lines are parallel.
C.The lines are perpendicular.
D.The lines intersect but are not perpendicular.
答案和解析
答案:C
解析:
Option C is correct.
重点单词