A student solved this problem and said the answer was 3 feet. Gina had two pieces of ribbon. One was foot long and the other was foot long. What was the total length of both pieces of ribbon combined? Is the student's answer reasonable?
Mathematics · Middle School · Tue Nov 03 2020
Answered on
Since Gina had one ribbon that's a foot long and the other was a foot longer therefore, a student solved the problem and answers 3 feet, it can be written as x plus 2x equals to 3. Given that we let x be the length of the ribbon.
To solve for this, substitute the value of x; x equals to 1(as stated by Gina)
> x plus 2x equals to 3
> 1 plus 2(1) equals to 3
> 1 plus 2 equals to 3
> 3 equals to 3
Since the student's answer is correct, the total legnth of both pieces of ribbon combined is 3 inches.