Please solve this question form me

What is the result of adding the system of equations? 2x+y=4 3x-y=6

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the given curves about y = 8.8y = x3, y = 0, x = 4use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the given curves about y = 8.8y = x3, y = 0, x = 4

If three points are collinear, they are also coplanar