Find such a coefficient for a for the linear equation ax-y=4, so that the graph of the equation would pass through the point M(3,5). Build the graph of this equation PLSSS I REALLY NEED HELP!!!

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

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

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