anonymous
  • anonymous
What is the value of Fraction 1 over 2x3 + 3.4y when x = 3 and y = 4?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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Michele_Laino
  • Michele_Laino
hint: \[\Large \frac{1}{{2{x^3} + 3.4y}} \to \frac{1}{{2 \times \left( {{2^3}} \right) + \left( {3.4 \times 4} \right)}} = ...?\]
anonymous
  • anonymous
25.6?
anonymous
  • anonymous
@Michele_Laino

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Michele_Laino
  • Michele_Laino
hint: \[\frac{1}{{2 \times \left( {{2^3}} \right) + \left( {3.4 \times 4} \right)}} = \frac{1}{{16 + 13.6}} = \frac{1}{{29.6}} = ...?\]
anonymous
  • anonymous
@Michele_Laino im really bad at fractions but i think its 31.6?
Michele_Laino
  • Michele_Laino
it is: \[\Large \frac{1}{{2 \times \left( {{2^3}} \right) + \left( {3.4 \times 4} \right)}} = \frac{1}{{16 + 13.6}} = \frac{1}{{29.6}} = 0.0338\] approximated value
Michele_Laino
  • Michele_Laino
\[\large \frac{1}{{2 \times \left( {{2^3}} \right) + \left( {3.4 \times 4} \right)}} = \frac{1}{{16 + 13.6}} = \frac{1}{{29.6}} = 0.0338\]
anonymous
  • anonymous
these are the choices though 15.85 18.1 27.1 31.6
Michele_Laino
  • Michele_Laino
Sorry I have made an error since we have to substitute x=3 before Nevertheless, my expression above is wrong.
anonymous
  • anonymous
oh
Michele_Laino
  • Michele_Laino
please write your expression using the editor, or make a drawing of your expression
anonymous
  • anonymous
|dw:1435768036043:dw|when x=3 and y=4
Michele_Laino
  • Michele_Laino
ok! then we have: \[\frac{1}{2}{x^3} + 3.4y \to \frac{1}{2} \times {3^3} + 3.4 \times 4 = \frac{{27}}{2} + 13.6 = ...?\]
anonymous
  • anonymous
27.1
Michele_Laino
  • Michele_Laino
that's right!
anonymous
  • anonymous
yay thank you (: @Michele_Laino
Michele_Laino
  • Michele_Laino
:)

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