Write the equation for the plane.The plane through the point P(-5, -3, -2) and parallel to the plane 
A. 5x + 7y + 4z = -49
B. 4x + 5y + 7z = 49
C. 4x + 5y + 7z = -49
D. -5x - 3y - 2z = -49
Answer: C
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Show that the equation is not an identity by listing the value(s) of the variable from among 0, 
, 
, and - 
for which the equation is false.sin ? + cos ? = tan ?
A. 0
B. 0, 
, 
, and - 
C. 0 and 
D. 0, 
, and - 
Use Gaussian elimination or Gauss-Jordan elimination to solve the problem.Ellen wishes to mix candy worth $4.68 per pound with candy worth $8.89 per pound to form 23 pounds of a mixture worth $7.61 per pound. How many pounds of the more expensive candy should she use?
A. 21 lb B. 7 lb C. 9 lb D. 16 lb
Simplify the algebraic expression.7 + 2(6x - 3)
A. 12x - 1 B. 6x + 1 C. 12x + 1 D. 12x + 4
Solve. x - z = -73x - y = -1 x + y + z = 18
A. (-1, 7, 9) B. (2, 7, 9) C. no solution D. (2, 3, 9)