shontaeia
shontaeia
18-09-2018
Mathematics
contestada
Answer 1, 2, 3, 6. That’s it
Respuesta :
jukkaduei
jukkaduei
18-09-2018
(1)
[tex] \frac{49}{ {x}^{2} } = 1 \\ 49 = 1 \times {x}^{2} \\ {x}^{2} = 49 \\ x = 7[/tex]
The answer is x = 7
(2)
[tex] {x}^{2} = 196 \\ x = 14[/tex]
The answer is x = 14
(3)
[tex] \frac{44}{13 - x} = 4 \\ 44 = 4(13 - x) \\ 44 = 52 - 4x \\ 4x = 52 - 44 \\ 4x = 8 \\ x = \frac{8}{4} \\ x = 2[/tex]
The answer is x = 2
(5)
[tex] \sqrt{2x + 7} = 5 \\ {( \sqrt{2x + 7} })^{2} = {5}^{2} \\ 2x + 7 = 25 \\ 2x = 25 - 7 \\ 2x = 18 \\ x = \frac{18}{2} \\ x = 9[/tex]
The answer is x = 9
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