Asked by math1
the original dimensions of a rectangle were 15 by 20 cm. when both dimensons were decreased by the same amount, the area of the new rectangle is half the area of the original rectangle. find the dimensons of the new rectangle.
Answers
Answered by
Damon
(15-x)(20-x) = (1/2)(15*20)
2(15-x)(20-x) = 300
300 - 35 x + x^2 = 150
x^2 -35 x + 150 = 0
(x - 5)(x - 30) = 0
that is zero if
x = 5 or if x = 30
2(15-x)(20-x) = 300
300 - 35 x + x^2 = 150
x^2 -35 x + 150 = 0
(x - 5)(x - 30) = 0
that is zero if
x = 5 or if x = 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.