Answer:
any even number is divisible by 2.
Here's an example: 2222
There are lots of others as well.
Since you have y alone on one side of the equation......
Use substitution and plug in 1/2x-4 for y in the other equation.

Distribute

Combine like terms

Add 8 to both sides

Divide by 4
and 
Plug this value in for x

Simplify

Multiply everything by 8 and simplify

Divide.....

Your answers are:

Answer:
0.36
Step-by-step explanation:
0.6 squared is 0.36
it is essentially 6 times 6 but as a decimal