=3(3z)2-3
=3(9z2)-3
=27z^2-3
=3(9z^2-1)
=3(3z+1)(3z-1)
Answer:
180 degree angles.
Step-by-step explanation:
180 degree angles are straight lines.
Answer:
15
Step-by-step explanation:
Answer:
8 seconds
Step-by-step explanation:
400 divided by 50 is 8
Answer:
2.1
Step-by-step explanation:
By the Law of Cosines,
a² = 5² + 6² - 2(5)(6)cos(20°)
a = sqrt(5² + 6² - 2(5)(6)cos(20°)), which is about 2.1