Multiply. Express the answer as a single polynomial in standard form.(x + 10)(x2 + 2x - 8)
A. x3 + 12x2 + 28x + 80
B. x3 + 12x2 + 12x - 80
C. x3 + 12x2 + 28x - 80
D. x4 + 10x3 + 2x2 + 12x - 80
Answer: B
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Solve using a matrix on a graphing calculator.
A. (4.2, 7.2, 3.9) B. (0.5, 0.9, 0.5) C. (2.1, 3.6, 1.9) D. (1.0, 1.8, 1.0)
Solve.The current i in an electric circuit is 
8 cos ?t. Write the first three terms of the Taylor series of this function about 
A. 8 cos 
- 8? sin 
- 4?2 cos 
2 + . . .
B. 8 cos 
- 8? sin 
+ 8?2cos 
2 + . . .
C. 8 cos 
+ 8?t sin 
+ 4?2t2 cos 
+ . . .
D. 8 cos 
- 8 sin 
- 4 cos 
2 + . . .
Solve the differential equation subject to the initial conditions.2 
- 4xy = 8x; y = 8 when x = 0
A. y = -2 + 10ex2 B. y = 2 + 8ex2 C. y = -2 + 10e-x2 D. y = -1 + 9ex2
Simplify the expression. Express the answer so that all exponents are positive. Whenever an exponent is 0 or negative, we assume that the base is not 0.(x-7y7)-4z3
A. 
B. 
C. 
D. 