Question

Find the answer pls...
$find \: the \: value \: of \: a \: for \: which \: point \: p ( \frac{a}{3}.2) \: is \: the \: mid \: point \: of \: the \: line \: segment \: joining \: the \: points \: q ( - 5.4) \: and \: r( - 1.0)$

Answer 1

Using midpoint theorem;
x1+x2/2; y1+y2/2
-5+-1/2 ; 4+0/2
-6/2 ; 4/2
-3 ; 2
But it is given that x =a/3
Therefore a/3=3
a=3*3
=9
Therefore a=9