oceanscity
oceanscity oceanscity
  • 13-08-2018
  • Mathematics
contestada

Have I been solving these equations correctly?

Have I been solving these equations correctly class=

Respuesta :

jdoe0001 jdoe0001
  • 13-08-2018

14)


2(-3)² => 2(-3)(-3) => 2*9 = > 18


27+18-11 => 27 + 7 = > 34.


16)


[tex] \bf p(x)=\cfrac{x^2-4}{2x+1}\implies p(-8)=\cfrac{(-8)^2-4}{2(-8)+1}\implies p(-8)=\cfrac{64-4}{-16+1}
\\\\\\
p(-8)=\cfrac{60}{-15}\implies p(-8)=-4 [/tex]


17)


[tex] \bf h(x)=3\cdot 9^x\implies h(-2)=3\cdot 9^{-2}\implies h(-2)=3\cdot \cfrac{1}{9^2}
\\\\\\
h(-2)=\cfrac{3}{9^2}\implies h(-2)=\cfrac{3}{81}\implies h(-2)=\cfrac{1}{27} [/tex]

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