Use the commutative and/or associative property of addition and then simplify.(r + 9) + 3
A. 12
B. r + 12
C. 9r + 3
D. 12r
Answer: B
Mathematics
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Use a product-to-sum identity to rewrite the expression.cos 2° cos 24°
A. 0.5(cos(-22°) - cos(26°)) B. 0.5(sin(26°) + sin(-22°)) C. 0.5(cos(26°) + cos(-22°)) D. 0.5(sin(26°) - sin(-22°))
Mathematics
Match the function to its graph.y = -cot (x + ?)
A. 
B. 
C. 
D. 
Mathematics
Solve the equation.6 ? n = 2784
A. n = 464 B. n = 466 C. n = 460 D. n = 462
Mathematics
Solve the inequality. Express your answer using interval notation. Graph the solution set.-2(6x + 7) < -14x - 12
A. (-?, 13]
B. (-?, 1)
C. (1, ?)
D. (-?, 1]
Mathematics