How do i find the answer to this math problem 3 (-8) + 4= 2 (-8) -4

Of four points are collinear, they are also coplanar

Find the pattern and use it to list the nth term in the sequence. 6, 12, 20, 30, 42, 56, the nth term of the sequence is

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are: