Determine whether matrix B is the inverse of matrix A by finding the product AB.A = 
, B = 
A. B = A-1
B. B ? A-1
Answer: B
Mathematics
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Use < or > for ? to write a true sentence. Draw a number line if necessary.0 ? 32
A. < B. >
Mathematics
Solve the problem.The length a spring is stretched from its natural length with work, W
is given by L = 
where k is a constant for the given spring. If a certain spring has a constant of 76.6, and the spring is to be stretched 1.2 feet from its natural length, how much work will be necessary? Round your answer to the nearest tenth.
A. 46 ft-lb B. 110.3 ft-lb C. 42 ft-lb D. 55.2 ft-lb
Mathematics
Solve the equation. Check your solution.
+ 
= - 
A. 
B. 
C. 
D. 
Mathematics
Find the derivative of the function.y = e-3x cos x
A. 
= e-3x(3cos x - sin x)
B. 
= e-3x(-3cos x + sin x)
C. 
= e-3x(-3cos x - sin x)
D. 
= e-3x(3cos x + sin x)
Mathematics