Answer:
96
Step-by-step explanation:
If B is the midpoint of AC, the length of AC has to be twice the length of AB. This is because AB = AC. Twice 48 is 96.
4 is missing I assume. But I could be wrong
The answer is B! Ive past my test for this task.
X would be 90° ... every x is 90°
The answer is D, i.e. the system was solved via elimination
If you multiply the first equation by 5, the system becomes

If you sum the two equations, you get

And so if you substitute the second equation of system A with this new equation, you'll get system B.