Assuming that cross means 'divide'
B is equal to 0
No, A+B is left as A+B AB would be A x B
i would suggest ,hm, getting a Bowflex ab machine.
4... if you plug it in, it works
Identity
Reflexive.
If AC equals 6 and BD equals 4, then AB equals 5.
yes because ab plus bc is ac
C minus B equals AB
the midpoint of AB.
x = ab x = 21*37 x = 777
8 1/3 = ab^-1, 1.8 =ab^2
The existence of the additive inverse (of ab).