Matrix A is given. Find appropriate identity matrices Im and In such that ImA = A and AIn = A.A = 
A. Im = 
, In = 
B. Im = 
, In = 
C. Im = 
, In = 
D. Im =
, In = 
Answer: A
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Factor the expression completely.18s2 + 60s + 48 (electricity)
A. (18s + 24)(s + 2) B. (3s + 4)(6s + 12) C. 6(3s2 + 10s + 8) D. 6(3s + 4)(s + 2)
Solve the problem.Find the center of mass of the upper half of a solid ball of radius 2 centered at the origin if the density at any point is proportional to the distance from that point to the 
A. (
, 
, 
) = 
B. (
, 
, 
) = 
C. (
, 
, 
) = 
D. (
, 
, 
) = 
Solve the problem.A size 12 dress in Country C is size -22 in Country D. A function that converts dress sizes in Country C to those in Country D is 
Find a formula for the inverse of this function.
A. f-1(x) = 
B. f-1(x) = 
C. f-1(x) = x + 34
D. f-1(x) = x - 34
Find the value of the determinant.
A. 31 B. 41 C. -41 D. -29