I need help with elimination and substitution .?

V

Vanisha Greene

New member
1.Solve the system using matrices. 2x - 8y = 12; x - 4y = -3


A.
(2, -1)



B.
(-3, 0)



C.
No Solution



D.
Infinitely many solutions






2. Solve the system using the elimination or substitution method. x + 2y - 3z = 9; -x + 3y - 2z = 1; 2x - 5y + 2z = 2


A.
(1, -3, 2)



B.
(0, 3, -2)



C.
(6, 3, 1)



D.
(3, 0, -2)







3. Solve the system using the elimination or substitution method. 14x - 7y = -7; 7x + y = 10


A.
(1, 3)



B.
(1, 1)



C.
(-1, -2)



D.
No solution







4. Solve the system using Cramer's rule. 2x + 8y = 11; 8x + 5y = -10


A.
(-3/2, 3)



B.
(-2, 3/2)



C.
(-5/2, 2)



D.
(2, 7/8)


5. Solve the system using matrices. 2x + 2y - z = -18; 3y + 4z = -7; 3x - 5y = 16


A.
(1, 5, -4)



B.
(-4, -1, -2)



C.
(3, -2, 2)



D.
(-3, -5, 2)
 
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