Solve the equation on the interval [0, 2?).cos2 x + 2 cos x + 1 = 0
A. 
, 
B. ?
C. 
, 
D. 2?
Answer: B
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Rewrite the system of inequalities, adding slack variables or subtracting surplus variables as needed. x1 + x2 ? 152x1 + 4x2 ? 23
A. x1 + x2 + s1 = 15 2x1 + 4x2 - s2 = 23 B. x1 + x2 - s1 = 15 2x1 + 4x2 + s2 = 23 C. x1 + x2 - s1 = 15 2x1 + 4x2 - s2 = 23 D. x1 + x2 + s1 = 15 2x1 + 4x2 + s2 = 23
Solve the problem.The number of dislocated electric impulses per cubic inch in a transformer when lightning strikes is given by d(x) = 9100(4)x, where x is the time in milliseconds of the lightning strike. Find the number of dislocated impulses at 
and 
A. 9100; 109,200 B. 9100; 582,400 C. 9100; 2,329,600 D. 36,400; 582,400
Determine whether the ordered pair is a solution of the given inequality.(-1, 4); 3x - 6y ? 3
A. Yes B. No
Perform the indicated operation.1.3(-4.98)
A. 6.38 B. -6.474 C. -3.68 D. 6.28