Answer:
19
Step-by-step explanation:
20 subtract 1 equals 19
Answer:
A.
Step-by-step explanation:
We are given that
A region: It includes all element of p but not q.
B region: It includes elements of p and q.It is represented by
.
C region: it contained the elements of q only.
Union of A , B and C are represented by

Hence, the region A,B and C represents by

Option A is true.
Answer:
Step-by-step explanation:
Definition: A letter that is placed in an unknown number place.
Example: 8+B+9
The variable would be B.