Find the exact value of the trigonometric expression without the use of a calculator.cos (135° + 240°)
A. - 
B. 
C. 
D. - 
Answer: B
Mathematics
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Solve.0.3(x + 7) = 12
A. x = 47 B. x = 33 C. x = 16.667 D. x = 5
Mathematics
Simplify. Assume that all variables represent non-negative real numbers.
A. 8a7b8
B. 8a3b4
C. 8a3b4
D. 8b4
Mathematics
Determine the possible number of positive real zeros and negative real zeros of the polynomial function using Descartes' rule of signs.f(x) = -6x5 - 8x4 - 4x3 + 5x2 + x + 16
A. 1 positive zero, 4, 3 or 1 negative zeros B. 1 positive zero, 4 or 2 negative zeros C. 1 positive zero, 2 or 0 negative zeros D. 1 positive zero, 3 or 1 negative zeros
Mathematics
Solve for the missing side, x.
Mathematics