Which one of the following points is a solution to the system? \[\begin{array} { l } - 8 x - 8 y - 5 z = - 6 \\ 7 x - 8 y - 9 z = 17 \\ 9 x + 2 y + 6 z = - 1 \end{array}\]

A) $( - 4,1,6 )$ B) $( 1,1 , - 2 )$ C) $( 1,6 , - 10 )$ D) All three points are solutions to the system. A) $( - 4,1,6 )$ B) $( 1,1 , - 2 )$ C) $( 1,6 , - 10 )$ D) All three points are solutions to the system.

Solve the system by the addition method. \[\begin{array} { l } 7 x + 9 y = 128 \\ 3 x - 9 y = - 48 \end{array}\]

A) $( - 1,15 )$ B) $( 17,1 )$ C) $( 8,8 )$ D) $( 17,11 )$ A) $( - 1,15 )$ B) $( 17,1 )$ C) $( 8,8 )$ D) $( 17,11 )$

Solve the system by using the substitution method. \[\begin{array} { l } x = - 0.9 y + 4.1 \\ y = - 0.9 x + 5.4 \end{array}\]

A) $( 3.2,1 )$ B) $( 0,5.4 )$ C) $( - 4,9 )$ D) No solution; \{ \}$;$ inconsistent system A) $( 3.2,1 )$ B) $( 0,5.4 )$ C) $( - 4,9 )$ D) No solution; \{ \}$;$ inconsistent system

Solve the system by the addition method. \[\begin{array} { l } - 5 x - 9 y = 28 \\ - 4 x + 5 y = - 2 \end{array}\]

A) $( - 2 , - 2 )$ B) $( 7 , - 7 )$ C) $( - 7 , - 6 )$ D) $( - 11,3 )$ A) $( - 2 , - 2 )$ B) $( 7 , - 7 )$ C) $( - 7 , - 6 )$ D) $( - 11,3 )$

Solve the system of equations. \[\begin{aligned} 10 x + 20 z & = 22 \\ y - 3 z & = - 2 \\ x - 5 y & = 2 \end{aligned}\]

A) $\left( \frac { 11 } { 5 } , 3,0 \right)$ B) $\left( 1 , - \frac { 1 } { 5 } , \frac { 3 } { 5 } \right)$ C) $( 0,7 , - 9 )$ D) $\left( 1,3 , \frac { 3 } { 5 } \right)$ A) $\left( \frac { 11 } { 5 } , 3,0 \right)$ B) $\left( 1 , - \frac { 1 } { 5 } , \frac { 3 } { 5 } \right)$ C) $( 0,7 , - 9 )$ D) $\left( 1,3 , \frac { 3 } { 5 } \right)$

Solve by using the substitution method. \[\begin{array} { r } x - 2 y = 16 \\ - 8 x - 8 y = 16 \end{array}\]

A) (14, -1) B) (12, -14) C) (4, -6) D) Infinitely many solutions; $\left\{ ( x , y ) \mid y = \frac { 1 } { 2 } x - 8 \right\}$ ; dependent system A) (14, -1) B) (12, -14) C) (4, -6) D) Infinitely many solutions; $\left\{ ( x , y ) \mid y = \frac { 1 } { 2 } x - 8 \right\}$ ; dependent system

Solve the system by the addition method. \[\begin{array} { l } - 12 x - 15 y = - 27 \\ - 0.4 x = 6.8 + 0.5 y \end{array}\]

A) $( - 24,21 )$ B) $( - 9,9 )$ C) Infinitely many solutions; $\left\{ ( x , y ) \mid y = - \frac { 4 } { 5 } x + \frac { 9 } { 5 } \right\}$; dependent system D) No solution; { } ; inconsistent system A) $( - 24,21 )$ B) $( - 9,9 )$ C) Infinitely many solutions; $\left\{ ( x , y ) \mid y = - \frac { 4 } { 5 } x + \frac { 9 } { 5 } \right\}$; dependent system D) No solution; { } ; inconsistent system

Solve the system. \[\begin{aligned} - 3 x + 15 y & = 3 \\ x & = 5 y - 1 \end{aligned}\]

A) $( 9,2 )$ B) $\left( 0 , \frac { 1 } { 5 } \right)$ C) Infinitely many solutions; $\left\{ ( x , y ) \mid y = \frac { 1 } { 5 } x + \frac { 1 } { 5 } \right\}$; dependent system D) No solution; { } ; inconsistent system A) $( 9,2 )$ B) $\left( 0 , \frac { 1 } { 5 } \right)$ C) Infinitely many solutions; $\left\{ ( x , y ) \mid y = \frac { 1 } { 5 } x + \frac { 1 } { 5 } \right\}$; dependent system D) No solution; { } ; inconsistent system

Solve the system by the addition method. \[\begin{array} { l } - 2.1 x - 3.9 y = 5.1 \\ - 2.3 x - 5.8 y = 11.7 \end{array}\]

A) $( 10.8 , - 6.3 )$ B) $( 8.9 , - 6.1 )$ C) $( 1.1 , - 1.9 )$ D) $( 5 , - 4 )$ A) $( 10.8 , - 6.3 )$ B) $( 8.9 , - 6.1 )$ C) $( 1.1 , - 1.9 )$ D) $( 5 , - 4 )$

Solve the system. \[\begin{array} { l } y = \frac { 1 } { 7 } x - 4 \\ x - 7 y = 1 \end{array}\]

A) $( - 13 , - 2 )$ B) $( 7 , - 3 )$ C) Infinitely many solutions; $\left\{ ( x , y ) \mid y = \frac { 1 } { 7 } x - 4 \right\}$; dependent system D) No solution; { } ; inconsistent system A) $( - 13 , - 2 )$ B) $( 7 , - 3 )$ C) Infinitely many solutions; $\left\{ ( x , y ) \mid y = \frac { 1 } { 7 } x - 4 \right\}$; dependent system D) No solution; { } ; inconsistent system