Find the value of x and why the diagram is not to scale

Type the correct answer in each box. spell all words correctly. a sequence of transformations maps ∆abc onto ∆a″b″c″. the type of transformation that maps ∆abc onto ∆a′b′c′ is a . when ∆a′b′c′ is reflected across the line x = -2 to form ∆a″b″c″, vertex of ∆a″b″c″ will have the same coordinates as b′.

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

Need plz been trying to do it for a long time and still haven’t succeeded