A and B are invertible matrices. Find the expression equivalent to the following.
?
?
A. 
B. 
C. 
D. 
E. none of these
Answer: D
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Solve the problem.The velocity field F of a fluid has a constant magnitude k and always points towards the origin. Following the smooth curve y = f(x) from (a, f(a)) to (b, f(b)), show that the flow along the curve is 
ds = k[(a2 + (f(a))2)1/2 - (b2 + (f(b))2)1/2]
What will be an ideal response?
Solve the problem.If f varies jointly as q2 and h, and 
when 
and 
, find f when 
and 
.
A. 18 B. 48 C. 288 D. 72
Solve using matrices.9x + 2y = -13x - 3z = -64y - 3z = 6
A. 
B. 
C. 
D. 
Translate the problem situation to a system of equations. Do not solve.The sum of two numbers is 71. Five times the smaller number minus twice the larger number is 201. What are the numbers?
A. x + y = 71; 2x - 5y = 201 B. x + y = 71; 5x - 2y = 201 C. x + y = 71; 5x + 2y = 201 D. x - y = 71; 5x + 2y = 201