Use the Gauss-Jordan method to find A-1, if it exists.A = 
A. 
B. 
C. 
D. Does not exist
Answer: B
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Find the amount of sales tax or tax rate and the total cost. Round money answers to the nearest cent if necessary.Amount of sale: $380 Amount of tax: $34.20
A. 0.9%, $414.20 B. 11%, $414.20 C. 10%, $414.20 D. 9%, $414.20
Find the constant term to be added to the expression to form a perfect square trinomial.x2 + 5x
A. - 
B. 0
C. 
D. - 
Solve the problem.The graph of a function is given below. Tell whether the graph could possibly be the graph of a polynomial function. If it could be the graph of a polynomial function, tell which of the following are possible degrees for the polynomial function: 3, 4, 5, 6.
A. yes; 4 only B. yes; 3, 5 C. no D. yes; 3 only
Find the exact value of the trigonometric expression without the use of a calculator.If cos ? = - 
, 
< ? < ? and sin ? = - 
, ? < ? < 
, find the exact value of cos (? + ?).
A. 
B. 
C. 
D. 