Are the points a, m, and i coplanar? yes or no?

Yes

Step-by-step explanation:

Three points are coplanar if they lie on the same plane.

Points A and M lie on the plane on the line Point I lies on the line which intersects the plane   at point V.

Since lines and IV intersect, there is a plane at which these two lines lie. Name this plane

Thus, points A, M and I lie on the plane so they are coplanar.

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w