anonymous
  • anonymous
FAN AND MEDAL!! Find the value of x so that the rectangles have the same area.
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
|dw:1442538186565:dw|
anonymous
  • anonymous

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anonymous
  • anonymous
anonymous
  • anonymous
anybody there
sidmanfu
  • sidmanfu
Ill ask someone that I know to help you ;)
anonymous
  • anonymous
ok
anonymous
  • anonymous
anonymous
  • anonymous
sidmanfu
  • sidmanfu
;)
anonymous
  • anonymous
i tried but its so confusing i dunno where to start
mathmate
  • mathmate
Hint: start with Area = length * width. |dw:1442539241188:dw|
anonymous
  • anonymous
i still dont understand
mathmate
  • mathmate
If the rectangles have the same area, then L1*W1=L2*W2 Substitute the numbers from the figure and solve for x.
anonymous
  • anonymous
ok and how do i solve for x
anonymous
  • anonymous
anonymous
  • anonymous
anybody there
anonymous
  • anonymous
@mathmate where did u go
sidmanfu
  • sidmanfu
hes still there lol XD
anonymous
  • anonymous
it seems like hes frozen
anonymous
  • anonymous
anybody help
dm91
  • dm91
ok sorry went offline for a bit what do you need help with?
mathmate
  • mathmate
I suggest you formulate the equation before trying to solve it. So could you substitute values L1, W1, L2, W2 and form an equation?
anonymous
  • anonymous
how do u do that
dm91
  • dm91
or L*W*H
mathmate
  • mathmate
There is no height, so L1*W1=L2*W2, we're calculating areas.
anonymous
  • anonymous
ok?
mathmate
  • mathmate
So can you formulate the equation? The values to be substituted is in the diagram.
mathmate
  • mathmate
*are
anonymous
  • anonymous
i know but what do i substitute with
Jhannybean
  • Jhannybean
\[L_1=~? \\ L_2=~? \\ W_1=~? \\ W_2=~? \\\]
Jhannybean
  • Jhannybean
Find those, then use this formula he gave you. \(\color{#0cbb34}{\text{Originally Posted by}}\) @mathmate There is no height, so \(\color{red}{L1*W1=L2*W2}\) , we're calculating areas. \(\color{#0cbb34}{\text{End of Quote}}\)
anonymous
  • anonymous
ok
anonymous
  • anonymous
anonymous
  • anonymous
anonymous
  • anonymous
im really confused this is is not going to get me anywhere. how do we do that?
dm91
  • dm91
i ahve one person that can explain it better @steve816
phi
  • phi
How far did you get ?
dan815
  • dan815
|dw:1442540874878:dw|
anonymous
  • anonymous
i didnt know where to start i was completely confused
dan815
  • dan815
start with that
phi
  • phi
Do you understand area is length times width ?
anonymous
  • anonymous
yes
phi
  • phi
do you know the width and length of your first rectangle (on the left side) ?
anonymous
  • anonymous
yes w=9, l=x-4
phi
  • phi
ok. now multiply them to get area to multiply put parens around (x-4) and just write it as 9(x-4) that is algebra short-hand for 9 times (x-4) ok so far?
anonymous
  • anonymous
YES! I THINK I GET IT! Just wait so that I can solve it.
phi
  • phi
can you do the same thing for the other triangle ?
anonymous
  • anonymous
u mean rectangle
phi
  • phi
oops, yes rectangle
anonymous
  • anonymous
ok ill try just wait but pls dont leave
anonymous
  • anonymous
is x=25??
anonymous
  • anonymous
@phi am i right
anonymous
  • anonymous
im sorry for being late i was confused again at first
anonymous
  • anonymous
@phi are u even there
anonymous
  • anonymous
ok i believe thats right because both rectangles have the same area with that value
phi
  • phi
yes x=25 how did you get it ?
anonymous
  • anonymous
i first used the distributive property to simplify, then used inverse subtraction, then inverse addition, then inverse division and then TADAA! I got my answer! YAY!
anonymous
  • anonymous
thanks for all the help @phi and @mathmate
phi
  • phi
yw
anonymous
  • anonymous
u guys r the best
anonymous
  • anonymous
bye

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