If pens cost 15 cents, how many can you buy with $3.00?

Is this a polynomial function? i need to know asap

Iwill give brainliest. suppose tommy walks from his home at (0, 0) to the mall at (0, 5), and then walks to a movie theater at (6, 5). after leaving the theater tommy walks to the store at (6, 0) before returning home. if each grid square represents one block, how many blocks does he walk?

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9