anonymous
  • anonymous
Math help please ! Question in comments
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
In trapezoid ABCD, E and F are the midpoints of the sides. If CD = 9, EF = 4x, and AB = 5x + 5/3, what is the value of x? Round the answer to the nearest hundredth. A. 3.15 B. 3.56 C. 4.67 D. 10.67
anonymous
  • anonymous
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Loser66
  • Loser66
You have a property of this too.

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Loser66
  • Loser66
It says \(EF = \dfrac{CD+ AB}{2}\) Replace the given information in and solve for x
anonymous
  • anonymous
\[4x = \frac{ 9 + 5x + \frac{ 5 }{ 3 }}{ 2 }\]
Loser66
  • Loser66
yup
Loser66
  • Loser66
now, solve for x
anonymous
  • anonymous
How ._.
anonymous
  • anonymous
I'm bad at math sorry
anonymous
  • anonymous
@Loser66
Loser66
  • Loser66
*2 both sides, what do you get? btw, I am suck at math also.
anonymous
  • anonymous
9 * 2 is 18 I know that much ._.
anonymous
  • anonymous
@Loser66
Loser66
  • Loser66
\[2*4x = \cancel 2*\frac{ 9 + 5x + \frac{ 5 }{ 3 }}{ \cancel 2 }\]
Loser66
  • Loser66
It is???
anonymous
  • anonymous
8x = 9 + 5x + 5/3
Loser66
  • Loser66
ok, combine like term from the right hand side, what do you have?
anonymous
  • anonymous
9 + 13x + 5/3
Loser66
  • Loser66
9 + 5/3 =??
Loser66
  • Loser66
9 = 27 /3, right?
Loser66
  • Loser66
so 27/3 + 5/3 = 32/3, right?
Loser66
  • Loser66
hence, it is 8x= 5x + (32/3)
Loser66
  • Loser66
Now, -5x both sides,

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