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

10-06-2016

I would go for A if anything

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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

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