Please answer this question :)

What is the smallest integer n such that n\sqrt{2} is greater than 20

Combine like terms to make a simpler expression 3z+z

An object is translated by (x + 4, y - 2). if one point in the image has the coordinates (5, -3), what would be the coordinates of its pre-image? (9, -5) (1, -5) (9, -1) (1, -1)