Answer:
kuyky
Step-by-step explanation:
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The sum of 2 integers with different signs is the difference between the two integers, the sign will be the same as the sign of the bigger number.
450
10*12= 120 the bottom of the box
10*7.5= 75 one side
75*2= 150 two sides
12*7.5= 90 another side
90*2= 180 two other sides
120+150+180 = 450
Hope this helped :)
