For 9) Joy is correct because a square has four sides so it is always a quadrilateral. Quadrilaterals do not always have equal sides so they are not always squares. For 10) The answer is C. To be a parallelogram, a shape must have two sets of parallel sides, which all 3 shapes have. For 11) The answer is A. A square has four sides and four right angles, so it is always a rectangle. Hope this helped :)
The correct answer is C. (5x+3) feet, and here is how I got it. This is the equation you need to use: (a+b)^2 = (a+b) (a+b) So, let us plug in 5x and 3 here: (5x+3)^2 = (5x+3)(5x+3) = 25x^2 + 15x + 15x + 9 = 25x^2 + 30x + 9 which is the area of the garden.
