Answer:
A intersection B = ( elements which are common in both)
= ( 2,4,7,19)
A union B = ( all the elements which are either in A or in B).
= ( 2, 4, 7 , 13, 14, 19, 20 , 3, 5, 6, 10,11, 12 , 15,17 , 18 , 19 )
Based on the type of equation, f(b) relates to y2, f(a) relates to y1, b relates to x2, and a relates to x1. If we change those around we now get:
(y2 - y1)/(x2 - x1) which is the slope formula, or the average rate of change. thus your answer would be C
Answer:
See Explanation
Step-by-step explanation:
Required
Expression for area of triangle
This is calculated using

Assume that:

The equation becomes

A=1 and 2
B=2 and 4
C=1,2,7 and 14
D=1,2,4,and 8