katytho
  • katytho
Will medal and fan! I need help on a K12 Math assessment it's 9:00 pm and Ive been trying to complete this all day :( please help here is picture of problem http://i.imgur.com/A9RtbOe.jpg
Mathematics
katieb
  • katieb
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katytho
  • katytho
if anyone could help me with this that would be great Ive done it 2 times and got bad grades both times
anonymous
  • anonymous
multiply both sides by 5 to clear the annoying fraction
katytho
  • katytho
the parentheses on the left side and on the right side?

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anonymous
  • anonymous
you should get \[2x-15+3x=21\tfrac{1}{4}\] now at least the fractions on the left are gone
anonymous
  • anonymous
yes left and right
katytho
  • katytho
okay
anonymous
  • anonymous
now combine like terms on the left, i .e. add \(2x+3x\)
katytho
  • katytho
okay 5x
anonymous
  • anonymous
so now we are at \[5x-15=21\tfrac{1}{4}\] add 15
katytho
  • katytho
sorry if my spelling or grammer is a bit off im really tired right now :|
katytho
  • katytho
what are we adding 15 to
anonymous
  • anonymous
no one here is a grammarian (least of all me)
anonymous
  • anonymous
the math teaches say "add it to both sides" but you really add it to the right to get rid of the -15 on the left
katytho
  • katytho
oh ok yes I think
katytho
  • katytho
5x = 21 1/4 is left
anonymous
  • anonymous
no
katytho
  • katytho
oh ok
anonymous
  • anonymous
you need to add the 15 to the right as well
katytho
  • katytho
5x = 36 1/4
anonymous
  • anonymous
\[5x=36\tfrac{1}{4}\]
anonymous
  • anonymous
yeah that i hate mixed numbers now divide by 5
katytho
  • katytho
divide what by 5 sorry again
katytho
  • katytho
5/5 ?
anonymous
  • anonymous
you have \[5x=36\tfrac{1}{4}\] and you want \[x=\text{sommat}\] to get there you have to divide both sides by 5
anonymous
  • anonymous
i.e. \[x=36\tfrac{1}{4}\div 5\]
katytho
  • katytho
7 1/4 right?
anonymous
  • anonymous
yup
katytho
  • katytho
:D THANK YOU!
anonymous
  • anonymous
yw you got more? i noticed you were on a deadline
katytho
  • katytho
That was actually the last question of the assessment i can tell you how i did tho
anonymous
  • anonymous
saved the best for last i guess
katytho
  • katytho
Ya
anonymous
  • anonymous
is it a placement test?
katytho
  • katytho
k12 is a bit wierd you take a small test to see if you learned everything correctly from the lesson before it after you go through the lesson.
anonymous
  • anonymous
ugh
katytho
  • katytho
By the way I got 5/5 :)
katytho
  • katytho
Thank you again
anonymous
  • anonymous
that is good! guess you got the first 4 on your own yw
katytho
  • katytho
ya ^-^

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