Step-by-step explanation:
for 7.
you are asked to find the mid value of the fractions,
i.e. the average value of numbers
[tex]\dfrac{\frac{3}{5}+\frac{3}{4}}{2} \\ = \frac{1}{2}\left(\frac{3\times4+4\times5}{5\times4}\right)\\ = \frac{27}{40} [/tex]
For the locus problem, it's the Angle bisector of
[tex]\angle ABC [/tex]
