Maria buys n pencils that cost p cents each. She pays with a $y note.
Find, in terms of n, p and y, the amount of change Maria receives.
Give your answer in cents.

What is the distance between (–2 1/2,-3) and (1, –3)?

How far could you drive on 50 gallons of gas

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