Find the opposite of the expression.3x2 + 9x - 6
A. -3x2 + 9x + 6
B. -3x2 - 9x + 6
C. 3x2 - 9x + 6
D. -3x2 - 9x - 6
Answer: B
Mathematics
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For the set of numbers, find the mean, median, and mode. 78, 70, 66, 66, 78, 80
A. mean: 74, median: 74, mode: 66 B. mean: 74, median: 73, mode: 78 C. mean: 73, median: 74, mode: 66 and 78 D. mean: 73, median: 66, mode: 80
Mathematics
Complete the identity.sec (? + ?) sec (? - ?) = ?
A. 
B. 
C. 
D. sec2? - sec2 ?
Mathematics
Use sum-to-product formulas to rewrite the expression as a product.cos 5x + cos 3x
A. 2 cos 4x sin x B. 2 cos 4x C. 2 cos 4x cos x D. 2 sin 4x sin x
Mathematics
Graph the equation using the indicated viewing window.y = x2 + 2;X min = -5X max = 5X scl = 1Y min = -20Y max = 20Y scl = 5
A. 
B. 
C. 
D. 
Mathematics