Simplify fully 8x2y
4xy

Tina practice piano for 15 hours last month and 45 hours this month use multiplication to write a statement comparing me i was tina practice during the two months use addition to write a statement comparing the hours tina practice during the two months

Taking algebra two apex courses and need with these questions

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.