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>I'm guessing you are saying...
6, 12, 18, 24, 30, 36, 42, 48, 54, 60,
66, 72, 78, 84, 90, 96, 102, 108, 114, 120,
126, 132, 138, 144, 150, 156, 162, 168, 174, 180,
186, 192, 198, 204, 210, 216, 222, 228, 234, 240,
246, 252, 258, 264, 270, 276, 282, 288, 294, 300,
306, 312, 318, 324, 330, 336, 342, 348, 354, 360,
366, 372, 378, 384, 390, 396, 402, 408, 414, 420,
426, 432, 438, 444, 450, 456, 462, 468, 474, 480,
486, 492, 498, 504, 510, 516, 522, 528, 534, 540,
546, 552, 558, 564, 570, 576, 582, 588, 594, 600
Hope this helps ;)</span>