i need help to answer q in precalculus

Anonymous
timer Asked: Nov 21st, 2016

Question description


Question 1 (4 points)

Question 1 Unsaved

Solve the system of equations by substitution.


Question 1 options:

B) x = 1, y = 16; (1, 16)

C) x = -1, y = -8; (-1, -8)

D) x = 1, y = -8; (1, -8)
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Question 2 (4 points)

Question 2 Unsaved

Solve the system of equations by elimination.


Question 2 options:

B) x = -18, y = 5; ( -18, 5)

C) x = -18, y = 6; (-18, 6)

D) x = -5, y = 18; (-5, 18)
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Question 3 (4 points)

Question 3 Unsaved

Solve the system of equations by substitution.


Question 3 options:

B) x = -2, y = 3; (-2, 3)

C) x = 3, y = 7; (3, 7)

D) x = 12, y = -2; (12, -2)
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Question 4 (4 points)

Question 4 Unsaved

Solve the system of equations. If the system has no solution, say that it is inconsistent.


Question 4 options:

B) x = 2, y = 3; (2, 3)

C) x = 2, y = 4; (2, 4)

D) inconsistent
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Question 5 (4 points)

Question 5 Unsaved

Verify that the values of the variables listed are solutions of the system of equations.




x = -3, y = 4

Question 5 options:

B) not a solution
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Question 6 (4 points)

Question 6 Unsaved

Find the value of the determinant.

Question 6 options:

B) 75

C) -45

D) 33
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Question 7 (4 points)

Question 7 Unsaved

Solve the system of equations using substitution.


Question 7 options:

B) x = -4, y = -3; x = -3, y = -4
or (-4, -3), (-3, -4)

C) x = -4, y = 3; x = -3, y = 4
or (-4, 3), (-3, 4)

D) x = 4, y = 3; x = -3, y = -4
or (4, 3), (-3, -4)
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Question 8 (4 points)

Question 8 Unsaved

Graph the system of inequalities.

-2x + y < 4
-2x + y > 1

Question 8 options:

B)

C) No solution

D)
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Question 9 (4 points)

Question 9 Unsaved

Solve the system of equations by elimination.


Question 9 options:

B) x = 1, y = 1; (1, 1)

C) x = 0, y = 1; (0, 1)

D) x = 1, y = 0; (1, 0)
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Question 10 (4 points)

Question 10 Unsaved

Solve the system of equations by substitution.


Question 10 options:

B) x = -7, y = 7; (-7, 7)

C) x = 6, y = -6; (6, -6)

D) x = -6, y = 6; (-6, 6)
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Question 11 (4 points)

Question 11 Unsaved

Graph the system of inequalities.

3x - y ≤ -9
x + 2y ≥ 6

Question 11 options:

B)

C)

D)
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Question 12 (4 points)

Question 12 Unsaved

Find the value of the determinant.

Question 12 options:

B) -2

C) 58

D) -11
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Question 13 (4 points)

Question 13 Unsaved

Verify that the values of the variables listed are solutions of the system of equations.




x = -1, y = 6

Question 13 options:

B) not a solution
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Question 14 (4 points)

Question 14 Unsaved

Graph the system of inequalities.

y > -2
x ≥ 5

Question 14 options:

B)

C)

D)
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Question 15 (4 points)

Question 15 Unsaved

Solve the system of equations by substitution.


Question 15 options:

B) x = 0, y = 0; (0, 0)

C) x = 1, y = 1; (1, 1)

D) x = 0, y = 1; (0, 1)

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