Explain why each statement is true: 1.) 5 + 2 + 3 = 5 + (2 + 3)
2.) 9a = 11a - 2a
3.) 7a + 4 - 2a = 7a + -2a + 4
4.) 8a-(8a - 8) = 8

12. decide whether each statement is always true, sometimes true, or never true. a. when corresponding points of an original figure and its reflection are connected, the resulting segments are all perpendicular to the line of reflection. b. when a point is reflected over a horizontal line, the y-coordinate of the point stays the same. answer both questions and explain

Drag the tiles to the boxes to form correct pairs. not all tiles will be used. match each set of vertices with the type of quadrilateral they form.

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.