What else would need to be congruent to show that ΔABC ≅ ΔDEF by AAS? A. ∠ A ≅∠C
B. AC ≅ DF
C. ∠ A ≅ ∠ D
D. BC ≅ EF

If a and b are the measures of two first quadrant angles and sin a = 4/9 and sin b = 2/5 find sin(a+b).

What are the solutions of the equation? 16x^2 + 24x + 5 = 5 a. 1/4, 5/4 b. -1/4, -5/4 c. -1/4, 5/4 d. 1/4 , -5/4

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible