Find the exact value of the expression using a sum, difference, or double-angle identity.cos 
A. - 
B. 
(
- 1)
C. 
D. -
( - 1)
Answer: C
Mathematics
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Multiply.9x3y(xy2 + 5)
A. 9x + 5x3y B. 45x3y C. x4y3 + 45x3y D. 9x4y3 + 45x3y
Mathematics
Classify the system as either consistent or inconsistent.
A. Inconsistent B. Consistent
Mathematics
Multiply.-96.397 × 100
A. -9639.7 B. -9589.7 C. -983.97 D. -963.97
Mathematics
Solve the system of equations.x1 + x2 + x3 = 6x1 - x3 = -2 x2 + 3x3 = 11
A. (1, 2, 3) B. No solution C. (-1, 2, -3) D. (0, 1, 2)
Mathematics