The total daily revenue (in dollars) that Weston Publishing realizes in publishing and selling its English-language dictionaries is given by
?
?
where x denotes the number of deluxe copies and y denotes the number of standard copies published and sold daily. The total daily cost of publishing these dictionaries is given by
?
?
dollars. Determine how many deluxe copies and how many standard copies Weston should publish each day to maximize its profits. Please round the answers to the nearest integer.
?
__________ deluxe copies
?
__________ standard copies
?
What is the maximum profit realizable? Please round the answer to the nearest dollar.
?
$__________
What will be an ideal response?
867; 1,855; 17,005
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The graph of an ellipse is given. Find the standard form of the equation of the ellipse. 
A. 
+ 
= 1
B. 
- 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Perform the indicated operation. Simplify if possible.
- 6x
A. 
B. 
C. 
D. 
Divide and simplify.
÷ 
A. 
B. -1
C. x - y + 4
D. 
Solve the problem.The number of centimeters, d, that a spring is compressed from its natural, uncompressed position is given by the formula d = 
, where W is the number of joules of work done to move the spring and k is the spring constant. Solve this equation for W. Use the result to determine the work needed to move a spring 9 centimeters if it has a spring constant of 0.2.
A. W = 2d2k; 32.4 joules
B. W = 
; 8.1 joules
C. W = 
; 810 joules
D. W = 
; 0.8 joules