Which additional transformation proves that △ABC∼△DEF?

  see below

Step-by-step explanation:

After the reflection, point B will be B'(-1, 1). In order to transform it to point E(-3, 3), it must be dilated about the origin by a factor of 3.

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

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