The question is in the photo(s). Thank you! (20 pts)

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

Solve the system of equations. y= 2x y= x^2 - 15

Which is a graph of a proportional relationship?