Anyways.Im failing math :D

In the triangles, bc =de and ac fe.if the mzc is greater than the mze, then ab isdfelth

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

The table shows the number of students who signed up for different after school activities. activity students cooking 9 chess 4 photography 8 robotics 11 select the true statements about the information in the table.