Solve.3(x + 7) = 3x + 21
A. x = 42
B. Infinite number of solutions
C. No solution
D. x = 0
Answer: B
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Add: (– 8 + 6) + (– 1 + 9)
A. –10 B. 10 C. 6 D. 24
Solve the problem.Express cos(A + B + C) in terms of sin A, sin B, sin C, cos A, cos B, and cos C.
A. cos A cos B cos C - sin A sin B cos C - sin A sin C cos B + sin B sin C cos A B. cos A cos B cos C + sin A sin B cos C + sin A sin C cos B - sin B sin C cos A C. cos A cos B cos C - sin A sin B cos C - sin A sin C cos B - sin B sin C cos A D. sin A cos B cos C + sin B cos A cos C + sin C cos A cos B - sin A sin B sin C
Simplify, if possible.
A. 
B. 
C. 
D. 
Write the compound statement in words.Let r = "The puppy is trained." p = "The puppy behaves well." q = "His owners are happy."r ? (p ? q)
A. The puppy is trained, the puppy behaves well, and his owners are happy. B. If the puppy is trained, then the puppy behaves well and his owners are happy. C. The puppy is trained and the puppy behaves well if his owners are happy. D. If the puppy is trained and the puppy behaves well, then his owners are happy.