randomecorner
  • randomecorner
What is the value of w? 5(9 − 3) = w • 9 – 5 • 3
Mathematics
chestercat
  • chestercat
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dan815
  • dan815
what will the expansion of 5(9-3) look like
dan815
  • dan815
remember the distributive law of multiplication
randomecorner
  • randomecorner
30

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dan815
  • dan815
yea okay but i mean just writing it out in general
dan815
  • dan815
like the middle step
dan815
  • dan815
5(9-3)=5*9 - 5*3
randomecorner
  • randomecorner
cuz of 9-3=6 times 5=30
dan815
  • dan815
okay dont simplify the inside now, just write out distributive law
dan815
  • dan815
5(9 − 3) = w • 9 – 5 • 3 5(9 − 3) = 5 * 9 - 5 * 3 <------- from distributive law of multiplication can you see what w has to be now
dan815
  • dan815
you can also do it this way if u want you already know it has to be 30
randomecorner
  • randomecorner
my math bokis horrible at explaining
dan815
  • dan815
30=w • 9 – 5 • 3 so what does w have to be to satisfy this equation
dan815
  • dan815
you know the period there is for multiplication right
randomecorner
  • randomecorner
by its self?
dan815
  • dan815
30=w • 9 – 5 • 3 hmm okay
randomecorner
  • randomecorner
and yes i do know that
dan815
  • dan815
look try plugging in numbers to get a feel for it
dan815
  • dan815
lets say u make w=2
dan815
  • dan815
is 2*9-5*3 = 30?
randomecorner
  • randomecorner
no
dan815
  • dan815
right so w is not 2
dan815
  • dan815
try a bigger number for w
dan815
  • dan815
lets say w=4
dan815
  • dan815
is this right 4*9-5*3=30?
dan815
  • dan815
are getting closer atleast
randomecorner
  • randomecorner
yes
dan815
  • dan815
try w=5 now what happens?
randomecorner
  • randomecorner
or i miscalculated it
randomecorner
  • randomecorner
no its still wrng
randomecorner
  • randomecorner
w=6
randomecorner
  • randomecorner
is and itwrong also
randomecorner
  • randomecorner
i hate math
randomecorner
  • randomecorner
5(6)= w(4)(3) 30=12w 30/12=w but 30/12 cant get enterd in the bx so we divide?
randomecorner
  • randomecorner
wich is 2.5
randomecorner
  • randomecorner
but we can break it down more to 1 by dividing them right?

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