1.Solve the system of equations using matrices. Use Gauss-Jordan

elimination.

3x - 7 - 7z = 7

6x + 4y - 3z = 67

-6x - 3y + z = -62

• A.{( 7, 1, 7)}
• B.{( 14, 7, -7)}
• C.{( -7, 7, 14)}
• D.{( 7, 7, 1)}

2.Eliminate the parameter t. Find a rectangular equation for the plane curve defined by the parametric equations.

x = 6 cos t, y = 6 sin t; 0 t 2

• A.x 2- y 2= 6; -6 x 6
• B.x 2- y 2= 36; -6 x 6
• C.x 2+ y 2= 6; -6 x 6
• D.x 2+ y 2= 36; -6 x 6