Solve the problem.If A is a 3 × 4 matrix and the matrix sum 
exists, what can you say about the matrix B?
A. B is a matrix with 4 columns
B. B is a matrix with 4 rows
C. B is a matrix with 3 rows
D. B is a 3 × 4 matrix
Answer: D
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Determine an appropriate viewing window for the given function and use it to display its graph.f(x) = x4 - 4x3 + 14x2 + x - 15
A. 
B. 
C. 
D. 
Evaluate the double integral.
A. 
(1 - cos 81)
B. 
cos 81
C. 
cos 81
D. 
(1 - cos 81)
Solve.A school has just purchased new computer equipment for 
The graph shows the depreciation of the equipment over 5 years. The point (0, 22,000) represents the purchase price and the point (5, 0) represents when the equipment will be replaced. Write a linear equation in slope-intercept form that relates the value of the equipment, y, to years after purchase x . Use the equation to predict the value of the equipment after 3 years.
A. y = - 22,000x + 22,000; value after 3 years is $-44,000.00 B. y = 22,000x + 5; value after 3 years is $8800.00 C. y = 4400x - 22,000; value after 3 years is $8800.00 D. y = - 4400x + 22,000; value after 3 years is $8800.00;
Use an algebraic method to find the vertices of the system of linear inequalities.
A. 
B. 
C. 
D. 
E. none of these