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