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first time on here
We are given L and W are the dimensions of the rectangle where L stands for length of the rectangle and W stands for width of the rectangle. We are also given by the first sentence that L is 2+3W or L=2+3W We are also given the the sum of the sides equals 100 meters->can you write this as a mathematical equation?
i am not that good at algebra
i can't make that many equations
sum means add can you write an equation expressing the sum of the sides=100 meters
there are 4 sides in a rectangle
opposite sides are equal
can you write the mathematical equation now?
for the sum of the sides is 100 meter?
do you know what sum of the sides of the rectangle means?
Do you see the side measurements in the rectangle above that I drew?
L+W+L+W <---this is suppose to be 100 L+W+L+W is the perimeter of the rectangle (this is just the sum of all the sides) L+W+L+W=100 combine like terms on the left hand side.
then sub in the other equation I gave you
oh ok. ... ... 2L+2w=100 L=2+3w
yes sub the equation equation you have written there into the first
... ... 3L+6w=100?
in the second equation do you see that L is (2+3w) replace the first L you wrote with (2+3w)
you will be able to solve for w and then you will use L=2+3w to find L after you have w
ran out of room
why did you omit part of the equation though?
yep solve that for w
do you know what distribute property is? a(b+c) can be written as a*b+a*c
distribute the 2 in front of the (2+3w)
then you can combine any like terms
you need to apply the distributive property there
6w+2w isn't 12w and 4 doesn't disappear
you have 4+8w=100 since 4 doesn't disappear and 6w+2w=8w
you need to isolate w
you mean cancle out 8?
I mean get w by itself
you are going to do to subtract both sides by a number to first isolate 8w then you will need to divide both sides by a number to isolate finally the w part
you could do that except it wouldn't isolate the 8w part
why not try to subtract 4 on both sides?
ok can you finish from there?
what are you going to do to both sides?
by what number?
:( why did you change w to l?
"The length of a rectangle is 2 more than 3 times the width. If the perimeter is 100 meters, what is the width of the rectangle? " This was the question you posted. Do you think you are done? (hint: don't forget the unit part of your answer)
well your question only asked to find the width which you sort of already did you just need the units part but if you wanted to find length (and here you will also need to put the units): but L=2+3w where we found w to be 12 so L=2+3(12)=2+38 L=38
do you remember what units were used in the question?
actually I put 38 instead od 36 and 2+36=38
anyways please don't forget to put the units in your answer
thx you're the best
np continue working on more examples
are even extra problems
have a nice day