gavinkvasnicka gavinkvasnicka

27-02-2015
Mathematics

contestada

Linear Inequalities

9x-5y>20

Respuesta :

Panoyin Panoyin

05-03-2015

9x - 5y > 20
9x - 9x - 5y > 20 - 9x
-5y > 20 - 9x
-5     -5
y > -4 + 9/5x
9x - 5(-4 + 9/5x) > 20
9x + 20 + 9x > 20
9x + 9x + 20 > 20
18x + 20 > 20
-20 -20
   18x > 0
      18 18
   x > 0
9(0) - 5y > 20
0 - 5y > 20
+0 +0
    -5y > 20
   -5    -5
   y > -4
(x, y) > (0, -4)

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