Help pls!Pls and ty!MIGHT GIVE BRAINLIST!!

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

Need on this geometry question. explain how you did it.

Yvaries directly as x. y =90 when x=6. find y when x=13