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zloy xaker [14]
4 years ago
9

2.1.61 Simplify the expression Subtract 5y - 1 from 2y - 9.

Mathematics
1 answer:
IgorLugansk [536]4 years ago
6 0
The answer to this is -3y-8
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In general we can use the shoelace formula for the area of any polygon given coordinates. We write the points like this:

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The area is then half the absolute value of the sum of the cross products:

A = \frac 1 2 | 7(6)-6(1) + 1(2)-6(4) + 4(6)-2(7) | = \frac 1 2 |24| = 12


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