Answer:
A. Vasily is not correct. He should have rewritten the original expression as −6(−5g−7h+9) and then as 30g+42h−54.
Step-by-step explanation:
Given the expression;
[tex] -6 (5g - 7h + 9 - 10g)[/tex]
Rearranging the above, we have;
[tex] -6 (5g - 10g - 7h + 9)[/tex]
Simplifying, we have;
[tex] -6 (-5g - 7h + 9)[/tex]
Multiply, to open the bracket;
[tex] 30g + 42h - 54[/tex]
Therefore, Vasily should have rewritten the original expression as −6(−5g−7h+9) and then as 30g+42h−54.