Mathematics
17 Online
OpenStudy (anonymous):
the length of a rectangle is 4.8 cm more than 2 times the width. If the perimeter of the rectangle is 52.8 cm, what are its dimensions?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
you must come up with an expression that will help you get the answer
OpenStudy (anonymous):
ok. The hint i got was P=2l + 2w
OpenStudy (anonymous):
I already know p is 52.8
OpenStudy (anonymous):
and l=2w+4.8 because your length must be 4.8cm longer than twice your width
OpenStudy (anonymous):
do you see how i got that
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
yes.
OpenStudy (anonymous):
52.8= 4w+4.8 ?
OpenStudy (anonymous):
i dont think it is necessary to multiply w by 2
OpenStudy (anonymous):
u should get the values for w and l before multiplying by 2
OpenStudy (anonymous):
ok then 52.8=2w+4.8
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
yes
OpenStudy (anonymous):
w=24 so then add 4.8 and multiply by 2?
OpenStudy (anonymous):
let me see
OpenStudy (anonymous):
24+4.8 =28.8
28.8 * 2 = 57.6/
so no
OpenStudy (anonymous):
i guess i should just subtract 52.8 and 24.
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
because you could plug in l=2w+4.8 into p=2l+2w
getting you 4w+9.6+2w=52.8
OpenStudy (anonymous):
try and see if that works
OpenStudy (anonymous):
that should get you the right answer and sorry for the confusion
OpenStudy (anonymous):
ok
yea it did thanks.