Find fx(x, y).f(x, y) = (x + y) ln (xy)
A. fx(x, y) = y ln (xy) + 
B. fx(x, y) = x ln (xy) + 
C. fx(x, y) = ln (xy) + 
D. fx(x, y) = ln (xy) + 
Answer: D
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Solve the problem.A car travels 400 miles on level terrain in the same amount of time it travels 160 miles on mountainous terrain. If the rate of the car is 30 miles per hour less in the mountains than on level ground, find its rate in the mountains.
A. 20 mph B. 40 mph C. 50 mph D. 80 mph
Write an equation in slope-intercept form for the line shown.
A. y = 
B. y = 
C. y = -4x
D. y = 4x
Provide an appropriate response.An initial investment of $2600 grows at an annual rate of 7.5% compounded monthly. Find how long it takes for the investment to amount to $3500.
Fill in the blank(s) with the appropriate word(s).
Give the coordinates of the circle's center and it radius.
?
?
Enter your answer using the coordinate notation: 
, and 
separated with a comma.
What will be an ideal response?