Dilation creates similar triangles, all the others are isometries, making congruent triangles. Choice a.
I would estimate 7 10/12 to 8 and i would estimate 2 11/12 to 3 so 8 plus 3 would equal 11 so that would be the estimate. the actual would be 10 8/11 so the estimate would be bigger.
-5+6a+(-8)+(-3a)=
=-5+6a-8-3a=
=3a+(-13)
