Evaluate the expression by first changing the form. Verify the answer by use of a calculator. sin 25° cos 35° + cos 25° sin 35°
A. 
B. 
C. 
D. 
Answer: D
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Solve the system of equations.
A. {(0, 0, -1)} B. {(0, -1, 0)} C. {(0, -1, 1)} D. {(-1, 0, -1)}
Solve the problem.Your company uses the quadratic model y = -11x2 + 350x to represent how many units (y) of a new product will be sold (x) weeks after its release. How many units can you expect to sell in week 21?
A. 12,201 units B. 7581 units C. 2499 units D. 7119 units
Use Descartes's Rule of Signs to determine the possible number of positive and negative real zeros for the given function.f(x) = -2x9 + x3 - x2 + 4
A. 2 or 0 positive zeros, 3 or 1 negative zeros B. 3 or 1 positive zeros, 2 or 0 negative zeros C. 2 or 0 positive zeros, 2 or 0 negative zeros D. 3 or 1 positive zeros, 3 or 1 negative zeros
Solve the system by elimination. If the system is inconsistent or dependent, say so. x - 6y = -376x - 7y = -48
A. (-2, 7) B. (1, 7) C. (-1, 6) D. empty set solution; inconsistent system