Question

Which of the following is a linear equation in $x$, $y$ and $z$? None of the given option $x^2 + y + 8z = 5$. $x^3 - 5y - az = 11$, where $a \in \mathbb{R}$ $x^2 + y + 8z = 5$. None of the given option $\cos x - y + z = 0$. $\pi - \sqrt{x^2} + y - z - 1 = 0$

          Which of the following is a linear equation in $x$, $y$ and $z$?
None of the given option
$x^2 + y + 8z = 5$.
$x^3 - 5y - az = 11$, where $a \in \mathbb{R}$
$x^2 + y + 8z = 5$.
None of the given option
$\cos x - y + z = 0$.
$\pi - \sqrt{x^2} + y - z - 1 = 0$

Which of the following is a linear equation in x, y and z?
None of the given option
x^2 + y + 8z = 5.
x^3 - 5y - az = 11, where a ∈ℝ
x^2 + y + 8z = 5.
None of the given option
cos x - y + z = 0.
π - √(x^2) + y - z - 1 = 0

Added by Magdalena B.

Elementary and Intermediate Algebra

Alan S. Tussy, R. David Gustafson 5th Edition

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Which of the following is a linear equation in y and z? None of the given options g = 28 + h + 2z 5y - az = 11, where a âˆˆ R x^2 + y + 8z = 5 None of the given options cosÎ¸ = 0 y - z + 1 = 0