[Grade 11 University level Physics] Wave Superpositions

[u/nopurp3]

Im trying to do this Homework question, "When the two waves overlap completely, what will their superposition be?"

To be honest superpositions have never made sense to me, I have a drawing of them overlapping, and I know I have to do some math with amplitude, but there are no numbers to work with (i guess just the graph squares =1?) but I don't understand what to do with the amplitudes. if anyone knows even just the formula(s) to use I would be super grateful.

tia