Indicate whether the expression is a polynomial or not a polynomial.11z5 + 3z-4 - 8z3 + 12
A. Not a polynomial
B. Polynomial
Answer: A
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Multiply and round to the nearest hundredth.-6.13(-0.24)(-6.3)
A. -9.27 B. 9.27 C. 1.47 D. -1.47
Solve the inequality algebraically. Express the solution in interval notation.
? 0
A. (-?, -5] ? [3, ?) B. [-5, 1) ? (1, 3] C. [-5, 1) ? [3, ?) D. (-?, -5] ? (1, 3]
Solve the system of equations using matrices. Use Gaussian elimination with back-substitution. x + y + z - w=6 2x - y + 3z + 4w=-4 4x + 2y - z - w=-13 -x - 2y + 4z + 3w=12
A. {(- 
, 
, 
, - 
)}
B. {(4, -3, -5, 2)}
C. {(
, - 
, - 
, 
)}
D. {(-4, 3, 5, -2)}
Solve the problem.The number of people P(t) (in hundreds) infected t days after an epidemic begins is approximated by
. When will the number of people infected start to decline?
A. Day 8 B. Day 7 C. Day 9 D. Day 10