Answer:
n = 6
Step-by-step explanation:
Since the triangles are similar then the ratio of corresponding sides are equal, that is
[tex]\frac{GH}{QR}[/tex] = [tex]\frac{FH}{PR}[/tex] , substitute values
[tex]\frac{n}{9}[/tex] = [tex]\frac{4}{6}[/tex] ( cross- multiply )
6n = 36 ( divide both sides by 6 )
n = 6
