sana is senior to Mona by 18 years after 6 years. Sana will be twice as old as Mona. find Mona, s percentage

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

For how answer my question this will be the last question can you answer in math subject

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling