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STatiana [176]
3 years ago
6

12.

Mathematics
2 answers:
max2010maxim [7]3 years ago
8 0

Answer:

D)7

Step-by-step explanation:

2 - (-8) + (-3) =

10-3 =7

Sveta_85 [38]3 years ago
7 0

Answer:

The answer is d because 10-3 is 7

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The perimeter of a triangle is 57 centimeters. The longest side is 3 ​centimeter(s) less than the sum of the other two sides. Tw
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Let's say x is longest side, y is shortest side and z is the other side. So we have some equations such that

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By the second equation, we have y+z=x+3 and if we use it in the first equation, then x+y+z=x+(x+3)=57. So x=27

Since x=27, if we use it in the third equation the we have 2y=x-15=27-15=12 then y=6

Therefore z=24


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