Evaluate
-\frac{20}{7}\approx -2.857142857
Factor
-\frac{20}{7} = -2\frac{6}{7} = -2.857142857142857
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49^{-\frac{1}{2}}-3
Fraction \frac{-1}{2} can be rewritten as -\frac{1}{2} by extracting the negative sign.
\frac{1}{7}-3
Calculate 49 to the power of -\frac{1}{2} and get \frac{1}{7}.
-\frac{20}{7}
Subtract 3 from \frac{1}{7} to get -\frac{20}{7}.
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