elizamullen
elizamullen elizamullen
  • 31-05-2019
  • Mathematics
contestada

Which expression is equivalent for this

Which expression is equivalent for this class=

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luisejr77
luisejr77 luisejr77
  • 31-05-2019

Answer: Option A

Step-by-step explanation:

Remember that

[tex]+ * - = -\\- * + = -\\+ * + = +\\- * - = +\\[/tex]

We have the expression

[tex]\frac{1}{2}x + (-7)-2*\frac{1}{4}-(-2)[/tex]

Solve first the multiplication of signs

[tex]\frac{1}{2}x + (-7)-2\frac{1}{4}x-(-2)\\\\\frac{1}{2}x -7-2\frac{1}{4}x+2\ \ \ \ \ \ \ \ Note:\ 2\frac{1}{4}=2+\frac{1}{4}=\frac{9}{4}\\\\\frac{1}{2}x -\frac{9}{4}x-7+2\ \ \ \ \ \ \ \ Note:\ \frac{1}{2}-\frac{9}{4}=-\frac{7}{4}=-1\frac{3}{4}\\\\-1\frac{3}{4}x -5[/tex]

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