Evaluate the determinant.
A. 21
B. 421
C. -21
D. -181
Answer: C
Mathematics
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Find a formula for the inverse of the function described below.A size 12 dress in Country C is size 40 in Country D. A function that converts dress sizes in Country C to those in Country D is 
A. f-1(x) = 
+ 8
B. f-1(x) = 
C. f-1(x) = 
- 8
D. f-1(x) = x - 8
Mathematics
Express the number in terms of j.-
A. 
B. - 
C. 
D. - 
Mathematics
Solve the problem.Determine the value(s) of b that will make x2 + bx + 9 a perfect square trinomial.
A. ±6 B. -6 C. 6 D. Not possible
Mathematics
Perform the indicated operations.(-6x2y + 7xy2 - 3xy + 7) + ( -2x2y - 3xy2 + 5xy - 10)
A. -8x2y + 4xy2 + 2xy - 3 B. 8x2y - 4xy2 - 2xy - 3 C. -15x2y2 - 3 D. -7x2y - 2xy2 - 4
Mathematics