Final answer:
Your friend is correct. A glide reflection cannot be formed with one translation followed by two reflections.
Step-by-step explanation:
Yes, your friend is correct. You cannot have a glide reflection if you have one translation followed by two reflections. A glide reflection is a transformation that combines a translation and a reflection.
In order to have a glide reflection, you need a specific order of transformations: first a reflection, then a translation in the direction of the reflection line, and finally another reflection in a different line.
If you have one translation followed by two reflections, this sequence of transformations does not match the requirements of a glide reflection. Therefore, your friend is correct in saying that it is not possible to have a glide reflection in this scenario.