40+90=130
180-130=50
50+130=180
x=130
50+x=180
Sadly, you didn't put any sums on your list of choices.
In fact, I can't even find a list of choices !
To find the distance between (7, -1) and (-8, -9),
you would build a sum under a square-root (radical)
symbol, and it would look something like this:
√ ( 225 + 64 ) .
<span>9 + 4p
</span><span>rewritten using the commutative property of addition = 4p + 9
</span><span>
answer </span><span>4p + 9 (first choice)</span>
The second. 4(8) it should be 32. not 48.
There are NO choices.
I know for TWO linear equations to have a unique solution they CANNOT be parallel.