Simplify the complex rational expression.
A. 
B. 5s + 3t
C. 3s + 5t
D. 
Answer: C
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Find the domain and graph the function.F(x) = 
A. D: (-?, 0)
B. D: (-?, ?)
C. D: (-?, 0]
D. D: [0, ?)
Solve.Karl Mason sold 
gross of data disks on Monday, 
gross on Tuesday, and 
gross on Wednesday. What was the total amount of data disks sold?
A. 3 gross
B. 
gross
C. 
gross
D. 
gross
Because of the increasingly important role played by coal as a viable alternative energy source, the production of coal has been growing at the rate of
?
?
billion metric tons/year t years from 1970 (which corresponds to 
). Had it not been for the energy crisis, the rate of production of coal since 1970 might have been only
?
?
billion metric tons/year t years from 1970. Determine how much additional coal was produced between 1970 and the end of the century as an alternate energy source. Round your answer to one decimal place.
?
A. 121.3 billion metric tons
B. 128.6 billion metric tons
C. 127.0 billion metric tons
D. 118.1 billion metric tons
Solve the equation.
+ 3 = 
+ 7
A. ?
B. 
C. 
D. 