Answer is B let me know if you need to know why i will explain in comments
Answer:
Undefined
Step-by-step explanation:
Answer:
a
Step-by-step explanation:
hope this will help u.........
(6 + 3) + 21 = 6 + (3 + 21)
It's an ASSOCIATIVE PROPERTY
(a + b) + c = a + (b + c)
i'm not sure how to solve the first one but the second is 150
