Suppose that y varies directly with x, and y=4 when x=20 find y when x=9

Let r = 3. what is the value of r + 58?

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?

Will give brainliest immeadeately true or false: the origin woud be included in the solution set for the inequality: y< 2x-5