Find the open interval(s) where the function is changing as requested.Decreasing; y = x4/5 + x9/5
A. 
B. (-?, 0), 
C. 
D. 
, (0, ?)
Answer: C
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Determine the indicated function.A rectangular garden is to be surrounded on three sides by a fence costing $5 per foot and on one side by a stone wall costing $20 per foot. Let x be the length of the side with the stone wall, and let y be the length of each of the other three sides. Express the cost C of enclosing the garden as a function of the length and width.
A. C(x, y) = 20x - 15y B. C(x, y) = (20x)(15y) C. C(x, y) = 15x + 20y D. C(x, y) = 20x + 15y
Find the exact value of the expression.
A. 
B. 
C. 
D. 2
Solve the system using elimination.4x + 
y = 132x + 
y = 
A. (-4, -5) B. (5, -5) C. (4, -4) D. empty set; inconsistent system
Solve the problem.Center City East Parking Garage has a capacity of 253 cars more than Center City West Parking Garage. If the combined capacity for the two garages is 1219 cars, find the capacity for each garage.
A. Center City East: 736 cars Center City West: 483 cars B. Center City East: 483 cars Center City West: 736 cars C. Center City East: 473 cars Center City West: 746 cars D. Center City East: 746 cars Center City West: 473 cars