?Find the determinant of the matrix 
.
?
A. ?
B. ?
C. ?
D. ?
E. ?
Answer: C
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Use Descartes' Rule of Signs to determine the possible number of positive real zeros and the possible number of negative real zeros for the function.f(x) = -4x4 - 5x3 - 9x2 - 3x + 8
A. 1 positive; 2 negative B. 0 or 2 positive; 0 or 2 negative C. 1 positive; 1 negative D. 1 positive; 1 or 3 negative
Perform the indicated operations. Simplify where possible.
+ 
A. 
B. 
C. 
D. 
Solve the problem.The amount of gas that a helicopter uses is directly proportional to the number of hours spent flying. The helicopter flies for 3 hours and uses 18 gallons of fuel. Find the number of gallons of fuel that the helicopter uses to fly for 4 hours.
A. 12 gal B. 30 gal C. 28 gal D. 24 gal
Evaluate the expression according to the order of operations. 63 ÷ 9 - 7
A. 27 B. 214 C. 17 D. 108