The correct answer is:
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" 77 / x " ; or; "x ÷ 77" .
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In algebra, the former is preferred; that is: " 77 / x " .
8-x because you are seeing how tall it grew this week
I believe the correct answer would be that it has one solution which is 5. Calculating x for the quadratic equation, you will only get one value so it should be one solution. Hope this answers the question. Have a nice day.