15 years from now Ravi's age will be four his present age what is Ravi is present age​

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

Me asap on # : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.

8. kelly wants to buy a magazine that is $25. later the magazine was marked up an additional 20%. what is the new price?