The intersection is where the sets overlap. picture a Venn diagram (two overlapping circles). The intersection is only the overlap part. So for this problem that would be C. {20}
Answer:
x = 
Step-by-step explanation:
Given
z = xy ( isolate x by dividing both sides by y )
= x
Answer:

Step-by-step explanation:
The multiplicative inverse of a number n is 
The product of the number and its multiplicative inverse = 1
n ×
= 1
Thus the multiplicative inverse of
is
= 