What degree of rotation about the origin will cause the triangle below to map onto itself? A. 270°
B. 180°
C. 360°
D. 90°

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

Use set buikder notation to represent the following set: {, -2, -1, 0}

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).