How do i work out the following simultaneous equations?
x+3y=11 and 2x-y=11
you, this is part of my half term homework and i really need to understand how to do this as soon as possible , you!

What is the value of r of the geometric series?

The vertices of a rectangle are given in the columns of the matrix . if is found to perform a transformation, what are the coordinates of the transformed rectangle? (0, 0), (0, –3), (–3, –3), (–3, 0) (0, 0), (0, 3), (3, 3), (3, 0) (0, 0), (0, 3), (–3, –3), (–3, 0) (0, 0), (0, 3), (–3, 3), (–3, 0)

What is the measure of angle tvu shown in the diagram below