Heres what my paper says Write each phrase as an algebraic

Here’s what my paper says: Write each phrase as an algebraic expression. 10.Fifteen increased by t.   11.five years older than Luis12.Nine dollars less than j  13.A number less six14.The product of r and 8    15.Twice as many oranges ….This is not all of them there’s ALOT more but idk his to do this and how to get the answers.Please guide me threw this , thanks , 6th grade student.