PLEASE FAST tell if the triangles could be proven congruent and prove?

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

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line

Me! i will mark you brainliest if you are right and show your i don't get polynomials and all the other stuff. multiply and simplify.2x(^2)y(^3)z(^2) · 4xy(^4)x(^2)show your