The ordered pair (-6,-9) will be located in quadrant IV.
There would be 18 books per box.
126/7 = 18
Hope this helps!
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From 81%, we get fraction 81/100
After reduced 81 fraction 100, we get...
0,81 [Change into decimal]
Since the hotdog is $2.99 with 7% tax increased by hotdog then
$2.99+0.07(2.99)
$2.99+$0.21
=$3.2