Factor each expression
1. 3n + 9
2. t² + 4t
3. 15 + 20x

Me answer number 3plz explain how you do it

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?

Write an equation in slope intercept form of the line passes through the given point and is parallel to the graph of the given equation (0,0); y=3/8 x+2