The graphing calculator screens show a system and the point of intersection. Choose the screen which best represents the given system.x = 32x + y = 3
A. 
B. 
C. 
D. 
Answer: D
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Solve the problem.A 20-kg mass is attached to a spring that hangs vertically and is stretched 3 m from the equilibrium position of the spring. Assume a linear spring with F(x) = kx. How much work is required to compress the spring and lift the mass 1 m? Round to four decimal places when appropriate.
A. 163.3333 J B. 212.3333 J C. 359.3333 J D. 16.3333 J
Find the open interval(s) where the function is changing as requested.Decreasing; f(x) = 
A. (-?, 5), (5, ?) B. (-?, 1), (1, ?) C. (-?, -1) D. none
Solve the problem.It costs $200 to start up a business of selling hot dogs. Each hot dog costs 
to produce. Let y be the cost in dollars of producing x hot dogs. How many hot dogs will be produced if total cost is $1040?
A. 1400 hot dogs B. 14 hot dogs C. 2800 hot dogs D. 140 hot dogs
Perform the indicated operation and simplify.
