1. Find the point of intersection of 2 + y = 5 and x - 3y = 7. 2. Use distances to determine whether or not the three points (1. 5), (-2, -1). and (4, 10) are collinear. Check your work by using slopes. 3. Find the lengths of the medians of the triangle with vertices (-3. 4), (5, 5), and (3, -2). 4. Use distances to determine whether or not the points (1, 6), (5, 3). and (3, () are the vertices of a right triangle. Check your work by using slopes. 5. Determine x so that (x, 1) is on the line joining (0, 4) and (4. -2). 6. Line /, contains the points (4, 7) and (2, 3), while /, contains (5, 6) and (-3, 4). Are / and /2 parallel, perpendicular, coincident, or none of these? 7. Find the slopes of the altitudes of the triangle with vertices (-2, 4), (3. 3), and (-5, -2)