Solve the system of equations. Let z be the parameter. 7x + 3y + 5z = -14 3x + y + 2z = -1
A. 
B. (-11 + z, 35 + z, z)
C. 
D. 
Answer: D
Mathematics
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Factor the trinomial completely.x5 + 2x4 - 48x3
A. (x4 + 8x3)(x - 6) B. (x2 - 8)(x3 + 6) C. x3(x + 8)(x - 6) D. x3(x - 8)(x + 6)
Mathematics
Use a product-to-sum identity to rewrite the expression.cos 12° sin 42°
A. 0.5(sin(54°) + sin (30°)) B. 0.5(cos(54°) - cos (30°)) C. 0.5(cos(54°) + cos (30°)) D. 0.5(sin(54°) - sin (30°))
Mathematics
Divide.
A. 
+ 
i
B. 
i
C. 
+ 
i
D. 
Mathematics
Perform the indicated operations and simplify the result. Leave the answer in factored form.
- 
A. 
B. 4x
C. 
D. 0
Mathematics