Asked by Casey
A rectangle is 6 cm long and 5 cm wide. When each dimension is increased by x cm, the area is tripled. Find the value of x.
Answers
Answered by
Steve
(6+x)(5+x) = 3*(6*5)
x^2 + 11x + 30 = 90
x^2 + 11x - 60 = 0
(x+15)(x-4) = 0
x = 4 -- we like positive dimensions
check: (6+4)(5+4) = 90 = 3*30
x^2 + 11x + 30 = 90
x^2 + 11x - 60 = 0
(x+15)(x-4) = 0
x = 4 -- we like positive dimensions
check: (6+4)(5+4) = 90 = 3*30
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.