Answer:
Step-by-step explanation:
circumference of the circle, C=2*3.14*r
C=31.4
31.4=2*3.14*r
r=31.4/(2*3.14)=5
20
1/2(a+b)=180
1/2(6+12)=18
1/2(18)=180
9/9=180/9
=20
Answer: 1. a^2 + 4a + 4
2. b^2 + 14b + 14
3. c^2 -6c + 9
The answer would be 2.
x = -2, y = -8
13(y + 6) - 6y = 22
=> 13y + 78 - 6y = 22
=> 7y = -56
=> y = -8
x = -8 + 6
=> x = -2
