Answer:
Step-by-step explanation:
x^2-4
5x+6
15-(x+3)
2(x-7)
Hope this is correct
Answer: r = -5/18
Step-by-step explanation: You solve -3(1+6r)+12=14
-3-18r+12=14 (When distributed)
-18r+9=14
-18r=5
r=-5/18
BDA=29°, BCD=72°