3 years ago

Describe the error in this computation (doing math) AND tell me how to fix the error by giving me the correct steps and solution

Mathematics

2 answers:

Nezavi [6.7K]3 years ago

5 0

Answer:

This person did not line up the decimals correctly. Therefor, he added incorrectly. We can fix the problem by lining the decimals correctly and starting from the right side to the left side.

Hope this helps!

solong [7]3 years ago

5 0

The decimal points need to be lined up you can fix this be adding a zero to the end of 11.9 and 18.6 and your answer would be 42.75

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Answer:

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Step-by-step explanation:

The expression is for the interior angle of the hexagon; one interior angle is equal to $(11x+21)^o$ .

Since an interior angle of a hexagon measures 120°, we have the equality

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Now it is just a matter of solving for $x:$

$11x=120-21\\\\11x=99\\\\x=\frac{99}{11} \\\\\boxed{x=9}$

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