What are the vertices of AA'B'C'if AABC is dilated by a scale factor of 2? A. A' (0,20), B'(8, 12), C'(4,4)
B. A' (0,20), B'(16, 12),C'(8,4)
C. A'(0,5), B'(4,3), C'(2,1)
D. A'(0,10), B' (16,6), C'(8,2)

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota