Provide an appropriate response.
An 84-lb mixture of two different grades of coffee is worth $306. If grade A is worth $3.75 per pound and grade B is worth $3.50 per pound, how many pounds of grade A were used?
A. 36 lb
B. 48 lb
C. 42 lb
D. 40 lb
Answer: B
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A. 
B. 
C. 
D. 
Given functions f and g, determine the domain of f + g.f(x) = 
,g(x) = 
A. (-?, -4) or (-4, 10) or (10, ?) B. (-?, ?) C. (-?, -10) or (-10, 4) or (4, ?) D. (-?, -5) or (-5, -4) or (-4, ?)
Refer to the circle graph to solve the problem.Time Required to Install Carpeting in a House (Work Shift = 8 hours) 
What fraction of the work shift was spent laying the padding and installing new carpet?
A. 
B. 
C. 
D. 
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A. 70 B. 86 C. 69 D. 13