Evaluate the algebraic expression for the given values of the variables.x - (y + z) for x = 20, y = 10, and z = 5
A. 35
B. 5
C. 15
D. 16
Answer: B
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 
A. Domain: all points in the xy-plane; range: real numbers > 0; level curves: ellipses 
B. Domain: all points in the xy-plane; range: all real numbers; level curves: ellipses 
C. Domain: all points in the xy-plane except (0, 0); range: all real numbers; level curves: ellipses 
D. Domain: all points in the xy-plane except (0, 0); range: real numbers > 0; level curves: ellipses 
Graph the inequality.-3 ? x < 1
A. 
B. 
C. 
D. 
Solve for the missing value. Round to four decimal places.n = 30; i = 0.03; PMT = $100; PV = ?
A. $2000.0441 B. $4706.6287 C. $1918.1585 D. $1960.0441
Solve by completing the square. If the equation has no real solutions, write "no real-number solutions."5x2 - 9x + 6 = 0
A. 
B. no real-number solutions
C. 
D. 9 ± 