Mathematics
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OpenStudy (emmynimmy):
A rectangular picture frame has a perimeter of 70 inches and a width 3 inches shorter than its length. Find the area of the picture frame.
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OpenStudy (emmynimmy):
it is going to be the answer with inches squared
OpenStudy (emmynimmy):
jhonyy9 (jhonyy9):
perimeter = 70 inches
w=l-3
yes ?
jhonyy9 (jhonyy9):
what is formula of perimeter of a rectangle ?
OpenStudy (emmynimmy):
P=2(l+w)
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jhonyy9 (jhonyy9):
exactly please rewrite it using w=l-3
OpenStudy (emmynimmy):
70=2(l+3)
OpenStudy (emmynimmy):
idk
jhonyy9 (jhonyy9):
P = 2(l+w)
P = 2(l+l-3) continue it please
OpenStudy (emmynimmy):
idk
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jhonyy9 (jhonyy9):
why not
assum the l+l inside parentheses
OpenStudy (emmynimmy):
i don't know how to solve
jhonyy9 (jhonyy9):
how many is l+l = ?
OpenStudy (emmynimmy):
2
jhonyy9 (jhonyy9):
2 what ?
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OpenStudy (emmynimmy):
2I
jhonyy9 (jhonyy9):
l mean length
OpenStudy (emmynimmy):
2 L
jhonyy9 (jhonyy9):
yes 2l
P = 2(2l -3) distribute the parentheses
jhonyy9 (jhonyy9):
P = 2*2l -2*3
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OpenStudy (emmynimmy):
p=4l-6
jhonyy9 (jhonyy9):
yes but you know that p=70
jhonyy9 (jhonyy9):
so how can you rewrite it using this p=70
OpenStudy (emmynimmy):
70=4l-6
jhonyy9 (jhonyy9):
yexactly and from this equation you can calculi easy the value of l
yes ?
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OpenStudy (emmynimmy):
sure
jhonyy9 (jhonyy9):
and than you know the value of l so you can calculi easy the value of w
OpenStudy (emmynimmy):
ok so what would my answer be
jhonyy9 (jhonyy9):
please calculi the l
jhonyy9 (jhonyy9):
bc. you know that area of a rectangle you get than you multiplie the length by width
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jhonyy9 (jhonyy9):
70=4l-6
l = ?
jhonyy9 (jhonyy9):
@emmynimmy you dont like ending this ?
OpenStudy (emmynimmy):
i got it, it was 304