HELP ME PLEASE- For the equation b=2a+4, a and b are integers.

The following three assumptions can be made about a and b for the equation above.
Ifa>0,thenb>0.
Ifa=0,thenb≠0.
Ifa<0,thenb<□.
What number is missing from the expression b<□ in the third assumption?

Step-by-step explanation:

if a is less than zero then b will from 4 down to negative infinity

so  b < 4

Does this help at all?   ask me some questions if you really want to learn about math ;)

15 routes.

Step-by-step explanation:

You just need to add all the routes that were between A and D, such as AB, BC, and CD. 4+5+6=15