Answer:
A
Step-by-step explanation:
B and D have to be supplementary otherwise it wouldn't be a parallelogram
Answer:1
Step-by-step explanation:
they have no other common factors
Answer:
The correct answer is B- 21b+7bc
Step-by-step explanation:
7b(3+c)
(7b)(3+c)
(7b)(3)+(7b)(c)
21b+7bc
1. . D . Identity , when you odd both properties it will always to be true on both sides