If 1 -2x ≤ 3, then ___
A
x ≤ -2
B
x ≥ -2
C
x ≤ -1
D
x ≥ -1
Correct Answer: x ≥ -1
The formula A + B + C + D will yield true (1) if at least one of A,B,C,D is 1. The formula A./B.C will be true only if A = 1, B = 0 (so /B = 1) and C = 1. Boolean algebra knows two distributive laws with operations AND and OR.