trielypJulia
trielypJulia trielypJulia
  • 10-06-2016
  • Mathematics
contestada

What are the solutions to the equation 9x2 = 49, rounded to the nearest tenth?

A.
2.3, –2.3

B.
5.4, –5.4

C.
7, –7

D.
21, –21

Respuesta :

MAXTORRES27
MAXTORRES27 MAXTORRES27
  • 10-06-2016
I would go for A if anything

Answer Link
Ckaranja
Ckaranja Ckaranja
  • 10-06-2016
A.
2.3, –2.3

Working;

[tex] 9x^{2} =49[/tex]
[tex] x^{2} = \frac{49}{9} [/tex]
x=[tex] \sqrt{ \frac{49}{9} } [/tex]
x= +-2.3
Answer Link

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