Which expression represents an unknown number added to 13? a) 13+t b) 13t c) 13-t d) 13/t

Use the diagonals to determine whether a parallelogram with vertices u(2,−2), v(9,−2), w(9,−6), and x(2,−6) is a rectangle, rhombus, or square. give all the names that apply.

Aphoto of a painting measured 13 x 17 inches the scale of the photo to the original painting is 1 inch to 3 inches. what is the size of this painting

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?