Systems With Three Unknowns

Solve the system.

• (1, 2, -5)

• (1, -2, 5)

• (2, -4, -5)

• (3, 1, -5)

Determine which ordered triple is a solution of the systems of equations?

2x+y=0

x+3y-z=-11

7x+5y+4z=21

• (0,0,11)

• (1,-2,6)

• (-1,2,-16

• (0,1,-14)

• x

• y

• z

A graph of a system of three linear equations in three variables is shown below.  How many solutions does the system have? 

• 1

• 2

• IMS

• 0

what is the value of s in the system of three

• s=3

• s=1

• s=2

• s=-1

Solve the system of equations: 

• ( 5, 1, -4)

• (-5, 3, -1)

• None of these

• ( -1, 5, -4)

A graph of a system of three linear equations in three variables is shown below.  How many solutions does the system have? 

• 1

• 2

• IMS

• 0

A graph of a system of three linear equations in three variables is shown below.  How many solutions does the system have? 

• 1

• 2

• IMS

• 0

A graph of a system of three linear equations in three variables is shown below.  How many solutions does the system have? 

• 1

• 2

• IMS

• 0

find the value of a 

• a=-5

• a=4

• a=5

• a=-4