the component of a vector x in the direction of another vector y is given by divide[x . y, y . y] y . what does this formula reduce to if y is a unit vector?

Use the matrix-column representation of the product to write each column of ab as a linear combination of the columns of a.

Ineed in figuring out this problem.

The rectangle shown has a perimeter of 108 cm and the given area. its length is 6 more than five times its width. write and solve a system of equations to find the dimensions of the rectangle.