If a = (7 9) and b = (3 12) what is the length of ab

AB=5

Step-by-step explanation:

The length can be found using the Pythagorean Theorem ...

c^2=a^2+b^2 and in this case:

d^2 = (dx^2) + (dy^2)

d^2 = (3-7) ^2 + (12-9) ^2

d^2=-4^2+3^2

d^2=16+9

d^2=25

d=5

So the length of AB=5 units.