Each matrix is nonsingular. Find the inverse of the matrix. Be sure to check your answer.
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Which of the following is proportionate? ?
A.
?
B.
?
C.
?
D.
?
E.
c and d are correct.
F.
?none of the above.
Mathematics
Calculate the flux of F across G.F(x, y, z) = xzi + yzj + k; G is the cap cut from the sphere x2 + y2 + z2 = 9 by the plane 
A. 35?
B. - 
?
C. 
?
D. 
?
Mathematics
Solve the problem.A heat engine is a device that converts thermal energy into other forms. The thermal efficiency, e, of a heat engine is defined by 
where Qh is the heat absorbed in one cycle and Qc, the heat released into a reservoir in one cycle, is a constant. Find 
.
A. 
= 
B. 
= Qh - Qc
C. 
= - 
D. 
= 
Mathematics
If the sequence is geometric, find the common ratio r. If the sequence is not geometric, say so.1, -3, 7, -11, . . .
A. 4 B. 1 C. -3 D. Not geometric
Mathematics