It's not a rational number because it's a continuous decimal. A rational number has an end.
5.5*3.14 = 17.27, which is already rounded to the nearest hundredth
(-2,-4)
Cramer's rule
10x - 4y = -4
-3x + 7y = -22
Main determinant : 58
Determinant of <em>x</em> : -116
Determinant of <em>y</em> : -232
So, (-2,-4)
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