Either the dimensions of two matrices or the matrices themselves are given. Find the dimensions of the product AB and the product BA. If either is not defined, say so.A = 
; B = 
.
A. AB is 2 × 2; BA is 1 × 1.
B. AB is not defined; BA is 2 × 2.
C. AB is 1 × 1; BA is not defined.
D. AB is 1 × 1; BA is 2 × 2.
Answer: D
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Indicate the property that justifies the statement.-(x + 4) + (x + 4) = 0
A. Additive inverse property B. Multiplicative inverse property C. Multiplication property of zero D. Additive identity property
Perform the operation and give the answer as a fraction in lowest terms.
A. 
B. - 
C. - 
D. 
Solve the problem.You have a tax refund of $496.61. You are able to get the tax refund immediately from your tax preparation agency for a finance charge of $49.88. What annual simple interest rate are you paying for this loan assuming the tax refund check would be available in 13 days? Round to the nearest hundredth.
A. 27.81% B. 30.92% C. 309.20% D. 278.14%
Complete the square to find the x-intercepts of the function.f(x) = x2 + 12x + 31
A. (6 + 
, 0), (6 - 
, 0)
B. (-6 + 
, 0), (-6 - 
, 0)
C. (-6 + 
, 2), (-6 - 
, 2)
D. (-6 + 
, 0), (-6 - 
, 0)