Decide whether the triangles are similar. if so, determine the appropriate expression to solve for x.
triangles are not similar: no expression for x can be found
△abc ~ △def; x=r•w/u △abc~△edf; x=r•w/u △abc~edf; x=r•w/z

Aprobability experiment is conducted in which the sample space of the experiment is s={7,8,9,10,11,12,13,14,15,16,17,18}, event f={7,8,9,10,11,12}, and event g={11,12,13,14}. assume that each outcome is equally likely. list the outcomes in f or g. find p(f or g) by counting the number of outcomes in f or g. determine p(f or g) using the general addition rule.