Dory bought 2 computers on sale for 210.99 each he sold them to his friend for 240$ each what was his profit ?

What is the missing reason in step 5? linear pair postulategivendefinition of complementary anglescongruent complements theorem

Ihonestly have no clue if it's each or none.

Alina fully simplifies this polynomial and then writes it in standard form. xy2 – 2x2y + 3y3 – 6x2y + 4xy2 if alina wrote the last term as 3y3, which must be the first term of her polynomial in standard form? xy2 5xy2 –8x2y –2x2y