Answer:
7
Step-by-step explanation:
2+4+3+4+3+4+5=25
32-25=7
Hope this helps :)
{(5,3) , (6,1), (7,-1), (8,-3)}
inverse of (x,y) is (y,x)
inverse of { (3,5), (1, 6), ( -1, 7), (-3, 8)} is
25CM
Answer: the "first" 1 is right