anonymous
  • anonymous
FAN AND MEDAL AWARDED Evaluate the expression, using the given value of the variable. z ÷ 3 – 5z + 4(z – 2) when z = 12 A. –98 B. –96 C. –16 D. –14
Mathematics
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SOLVED
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katieb
  • katieb
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AravindG
  • AravindG
Ok use BODMAS rule and substitute x=12 in the equation
AravindG
  • AravindG
@alahrichi1
anonymous
  • anonymous
I did that and got -5

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More answers

AravindG
  • AravindG
try again?
AravindG
  • AravindG
can u please show ur step then i can know where you are making mistake
AravindG
  • AravindG
@alahrichi1 ?
anonymous
  • anonymous
=12+3-5*12+4(12-2) =12+3-5*12+4*10 =12+3-60+4*10 =12+3-60+40 =15-100 =-85
AravindG
  • AravindG
ok ur first step is right
AravindG
  • AravindG
you considered the brackets and got 10
anonymous
  • anonymous
yes..
AravindG
  • AravindG
and note it is z/3 not z+3 !!
anonymous
  • anonymous
OMG!!!!!!!!!!!! thanks sooo much!! thats where my mistake was!!!
AravindG
  • AravindG
=12/3-5*12+4*10 =12/3-5*12+40 now do division
AravindG
  • AravindG
yw :)
anonymous
  • anonymous
ok 1 sec
anonymous
  • anonymous
-96
AravindG
  • AravindG
try again?
AravindG
  • AravindG
show me ur step after =12/3-5*12+4*10 =12/3-5*12+40
anonymous
  • anonymous
=4-60+40 =-96 :D
AravindG
  • AravindG
-60+40=??
AravindG
  • AravindG
reply pls i gotta sleep after finishing this !!
AravindG
  • AravindG
@alahrichi1 .......
anonymous
  • anonymous
-20
AravindG
  • AravindG
-20+4=?
anonymous
  • anonymous
no bro, not -60+40 its 4 minus 60
AravindG
  • AravindG
both are same :)
AravindG
  • AravindG
subtraction is actually a form of addition only :)
AravindG
  • AravindG
whatevr way you do the answer will be same
AravindG
  • AravindG
4-60=?
AravindG
  • AravindG
please reply fast ?
anonymous
  • anonymous
-56
AravindG
  • AravindG
-56+40 =?
anonymous
  • anonymous
-16
AravindG
  • AravindG
:D you done it !!!
AravindG
  • AravindG
if you did other way also you will get -16 see =4-60+40 =4-20 =-16
AravindG
  • AravindG
beauty of mathematics !!
anonymous
  • anonymous
omg dude u are a legend
AravindG
  • AravindG
:D thanks ..nw i can sleep :)
anonymous
  • anonymous
good nite
AravindG
  • AravindG
thanks hav good day/night :)
anonymous
  • anonymous
u too

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