Ask
your own question, for FREE!
Mathematics
63 Online
OpenStudy (anonymous):
The length of a rectangle is 10cm and the width is 6sm. Each side is enlarged by x cm. The enclosed area of the new rectangle is 480 cm. Whats the new dimensions of the ractangle, and how?
Still Need Help?
Join the QuestionCove community and study together with friends!
OpenStudy (anonymous):
(10+x)(6+x)=480
OpenStudy (anonymous):
60 + 16x +x^2=480
OpenStudy (anonymous):
I got -30 by 14 which is impossible
OpenStudy (anonymous):
x^2+16x=420
OpenStudy (anonymous):
i used the quadratic formula
Still Need Help?
Join the QuestionCove community and study together with friends!
OpenStudy (anonymous):
x^2+16x-420 (x-14)(x+30)=0 x=14 or -30 it can be negative so x=14
OpenStudy (anonymous):
and then 10+14 and 6+14
OpenStudy (anonymous):
Yes
OpenStudy (anonymous):
Thanks!
Can't find your answer?
Make a FREE account and ask your own questions, OR help others and earn volunteer hours!
Join our real-time social learning platform and learn together with your friends!
Join our real-time social learning platform and learn together with your friends!
Latest Questions
notmeta:
I need ideas for a fictional business :P (has to be a sole proprietorship)
4 hours ago
1 Reply
2 Medals
0bviouslyNotRakita:
Letu2019s say you want to go to XYZ Medical School as itu2019s located in Corpus Christi, TX and youu2019d love to live on the beach while attending medical
9 hours ago
0 Replies
0 Medals
Angie2009:
Can anyone here help me learn Korean? My brothers want me to move back to Korea b
9 hours ago
3 Replies
0 Medals
Subshilava:
Which of the following is the real root and which is the non real root X=2+-i X=4
9 hours ago
4 Replies
1 Medal
Alanaaaaaaa:
Shattered Whispers In the dim light where shadows creep, She stood, a specter in my dreams, Eyes like burning coals, secrets to keep, Her laughter danced on
3 hours ago
35 Replies
2 Medals