aknylaunique aknylaunique

26-01-2022
Mathematics

contestada

If k > 0 and x = 7 in the equation above, what is the
value of k ?
A) 2
B) 3
C) 4.
D)5

If k gt 0 and x 7 in the equation above what is the value of k A 2 B 3 C 4 D5 class=

Respuesta :

akabane009 akabane009

28-01-2022

k=4 C) is the correct answer.

Step-by-step explanation:

Plugging in the value,

[tex] \sqrt{2k {}^{2} + 17} - x = 0 \\ \sqrt{2k {}^{2} + 17} - 7 = 0 \\ \sqrt{2k {}^{2} + 17 } = 7 \\ 2k {}^{2} + 17 = 49\\ 2k {}^{2} = 32 \\ k {}^{2} = 16 \\ k = 4[/tex]

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