A) \[-\,7\]
B) 4
C) 7
D) \[-\,4\]
Correct Answer: C
Solution :
[c] Here, \[20x\,+5y=3\] \[\Rightarrow 5y=-\,20x+3\] \[\therefore \,\,\,y=-\,4x+\frac{3}{5}\] Sloop of \[20x+5y=3p-4\] We know, product of slopes \[=-\,1\] for perpendicular lines Hence, the slope of the line which passes through \[(-2,\,\,5)\,\,and\,\,(6,\,\,b)=\frac{b-5}{6-(-2)}\] Now, \[\frac{b-\,5}{6+2}=\frac{1}{4}\Rightarrow b-5\,=2\] \[\therefore b=5+2=7\]You need to login to perform this action.
You will be redirected in
3 sec