Answer:
10
Step-by-step explanation:
If AB, BC and AC means A x B, B x C, A x C:
AB = 2 BC = 5
B = 1
A = 2
C = 5
AC = 10
5
AB=2 meaning A=1 and B=1
BC=5 so B=1 and C=4
A+C aka 1+4=5
