Solve the system using the matrix inverse method. 7x - 3y - z = 28 x - 6y - 3z = -27 8x + y + z = 56
A. ?
B. {(-6, 3, 12)}
C. {(6, 5, 3)}
D. {(6, 3, 5)}
Answer: D
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Determine whether the relation is a function.{(-5, -2), (-2, -1), (2, -5), (2, -2)}
A. Not a function B. Function
Determine which fractions are proper.
, 
, 
, 
, 
A. 
, 
, 
, 
, 
B. 
, 
C. 
, 
, 
, 
D. 
, 
, 
Solve.Find the volume of a rectangular box 7 feet by 8.8 feet by 2 feet.
A. 154.88 cu ft B. 28 cu ft C. 431.2 cu ft D. 123.2 cu ft
Use Descartes' Rule of Signs and the Rational Zeros Theorem to find all the real zeros of the polynomial function. Use the zeros to factor f over the real numbers. f(x) = x4 + 21x2 - 100
A. -5, 5; f(x) = (x - 5)(x + 5)(x2 + 4) B. -2, -5, 2, 5; f(x) = (x - 2)(x + 2)(x - 5)(x + 5) C. 2; f(x) = (x - 2)2(x2 + 25) D. -2, 2; f(x) = (x - 2)(x + 2)(x2 + 25)