Combine like terms and write the resulting polynomial in descending order of powers.2x7 + 7x4 + 3x7
A. 5x7 + 7x4
B. Cannot be simplified
C. 12x4
D. 12x18
Answer: A
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Solve the problem.Find the moment of inertia about the y-axis of the thin infinite region of constant density 
in the first quadrant bounded by the coordinate axes and the curve 
.
A. 
B. 
C. 
D. 
Evaluate the improper integral.
A. 
B. 
C. 
D. 
Perform the indicated operations using a calculator. 
- 0.0756
A. -0.038 B. -0.0383 C. 0.11 D. 0.1129
Determine whether the system corresponding to the given augmented matrix is consistent or inconsistent. If it is consistent, give the solution.
A. consistent; x1 = 8, x2 = -7, x3 = -3, x4 = -7; (8, -7, -3, -7) B. consistent; x1 = 3 + x4, x2 = -5 + 8x4, x3 = -7x4, x4 any real number or {(x, y, z)|x1 = 3 + x4, x2 = -5 + 8x4, x3 = -7x4, x4 any real number} C. consistent; x1 = 3 - x4, x2 = -5 - 8x4, x3 = 7x4, x4 any real number or {(x, y, z)|x1 = 3 - x4, x2 = -5 - 8x4, x3 = 7x4, x4 any real number} D. inconsistent