英数题:If the four points (2,7),(7,-3),(1,9) and (6,y) lie on a line,what is the value of If the four points (2,7),(7,-3),(1,9) and (6,y) lie on a line,what is the value of
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英数题:If the four points (2,7),(7,-3),(1,9) and (6,y) lie on a line,what is the value of
If the four points (2,7),(7,-3),(1,9) and (6,y) lie on a line,what is the value of
the value of y is -1
(-3-7)/7-2=(y-9)/6-1
-10/5=(y-9)/5
y=-1
有不会的可以再问我
由题知,(6-1)/(y-9)=(7-2)/(-3-7)
即5/(y-9)= -1/2
y-9= -10
y= -1能不能给一下翻译?谢谢If the four points (2,7),(7,-3),(1,9) and (6,y) lie on a line,what is the value of y? 如果 (2,7),(7,-3),(1,9) , (6,y)四个点...
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由题知,(6-1)/(y-9)=(7-2)/(-3-7)
即5/(y-9)= -1/2
y-9= -10
y= -1
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英数题:If the four points (2,7),(7,-3),(1,9) and (6,y) lie on a line,what is the value of If the four points (2,7),(7,-3),(1,9) and (6,y) lie on a line,what is the value of
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