Solve the system algebraically.y = 5x + 10y = 2x + 7
A. no solution
B. (1, -5)
C. (-1, 5)
D. (1, 5)
Answer: C
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = ln (5x + 9y)
A. Domain: all points in the xy-plane satisfying 5x + 9y ? 0; range: all real numbers; level curves: lines 
B. Domain: all points in the xy-plane satisfying 5x + 9y > 0; range: all real numbers; level curves: lines 
C. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
D. Domain: all points in the xy-plane satisfying 5x + 9y > 0; range: real numbers z ? 0; level curves: lines 
Perform the indicated operation involving cylindrical coordinates.Find the cylindrical coordinates of the point whose rectangular coordinates are (-5
, 5, 7).
A. 
B. 
C. 
D. 
Translate the English sentence into an equation using the variables indicated.The attendance at the theater on Friday night was greater than the attendance on Saturday night. The difference in the attendance between the two nights was 716 people. Use f for the number of people at the theater on Friday and s for the number of people at the theater on Saturday.
A. s - f = 716
B. f + s = 716
C. 
= 716
D. f - s = 716
Find the derivative of the function.
?
?
A. 
B. 
C. 
D. 
E. 