Answer:
According to Bodmas rule, if an expression contains brackets ((), {}, []) we have to first solve or simplify the bracket followed by of (powers and roots etc.), then division, multiplication, addition and subtraction from left to right.
Step-by-step explanation:
-4x + 20 +3a - 21
3a - 4x - 1
Answer:it should be B and D
Step-by-step explanation:
B could be rotated clockwise and D could be rotated clockwise as well.
Sometimes system outputs are limited because the amount of the necessary information that is perceived in the system .