Perform the indicated operation. Write the answer in simplest form. If the answer is an improper fraction, write it as a mixed number.2
? 1
A. 5
B. 2
C. 4
D. 7
Answer: C
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Provide an appropriate response.
Find cos A to the nearest ten-thousandth if a = 14.5, b = 7.8, and c = 16.5.
A. 2.1154 B. 1.1379 C. 0.4727 D. 0.8788
Match the solution of the system of inequalities with the graph.
A. 
B. 
C. 
D. 
The function f is one-to-one. State the domain and the range of f and f-1. Write the domain and range in set-builder notation.f(x) = 
A. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
B. f(x): D is all real numbers, R is all real numbers;
f-1(x): D is all real numbers, R is all real numbers
C. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
D. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
Solve the problem.The polynomial function 
represents the yearly income (or loss) from a real estate investment, where t is time in years. After what year does income begin to decline?
A. 7.5 B. 8.5 C. 17 D. 11.33