Solve the problem.Suppose the sales of a particular brand of appliance are modeled by the linear function 
, where S(x) represents the number of sales in year x, with 
corresponding to 1982. Find the number of sales in 1991.
A. 5740
B. 11,610
C. 11,740
D. 5870
Answer: D
Mathematics
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Find the vertex for the parabola whose equation is given.y = 6x2 + 12x - 9
A. (1, 9) B. (2, 39) C. (-1, -15) D. (-2, 3)
Mathematics
Perform the indicated operation and simplify. Assume all variables in the radicand are greater thanor equal to zero.
A. 
B. 2a3b7
C. 2a6
D. 
Mathematics
Solve the problem.A boat heads upstream a distance of 30 miles on the Mississippi river, whose current is running at 5 miles per hour. If the trip back takes an hour less, what was the speed of the boat in still water? Give the answer rounded to two decimal places, if necessary.
A. 18.03 mph B. 15 mph C. 16.58 mph D. 6 mph
Mathematics
Graph the piecewise linear function.f(x) = 
A. 
B. 
C. 
D. 
Mathematics