John constructs various sizes of rectangular desktops. He designs these desktops so that the length is 5 inches longer than the width.
a) Write a linear equation for the perimeter P, in terms of its width, w
b) If the perimeter of the desk is 130 inches, what is the length of the desk?
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use area of rec=l*b
p=2(i+b)
p=2(i+b)
Answered by
1
a)
if P is taken as perimeter, and w as width.
then the length will be w+5
⇒P=2(w+w+5)=2(2w+5)=4w+10
b) If perimeter is 130 in
130=4w+10
⇒120=4w
⇒w=30
So the length will be 35 in.
if P is taken as perimeter, and w as width.
then the length will be w+5
⇒P=2(w+w+5)=2(2w+5)=4w+10
b) If perimeter is 130 in
130=4w+10
⇒120=4w
⇒w=30
So the length will be 35 in.
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