Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = ln (3x + 3y)
A. Domain: all points in the xy-plane satisfying 3x + 3y > 0; range: all real numbers; level curves: lines 
B. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
C. Domain: all points in the xy-plane satisfying 3x + 3y > 0; range: real numbers z ? 0; level curves: lines 
D. Domain: all points in the xy-plane satisfying 3x + 3y ? 0; range: all real numbers; level curves: lines 
Answer: A
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Solve the problem.The Habers purchase a $7000 living room set, putting $500 down and agreeing to pay $350.50 each month for 2 years. After 14 payments, they decide to pay off the note. How much is saved in interest? How much is needed to pay the balance of the loan?
A. $350.53, $3154.47 B. $353.37, $3152.13 C. $351.71, $3153.79 D. $357.65, $3147.85
Graph the function using transformations.f(x) = 4 - 
A. 
B. 
C. 
D. 
Let x be a number. Translate the following into an expression or an equation, as appropriate, and then simplify the expression or solve the equation.One-half a number, minus ten, plus three times the number
A. 
x - 10 + 3x
B. 
x - 10
C. 
x - 7
D. 
x - 5
Find the length of the circular arc associated with the angle ?. An angle of measure 
in a circle of radius 2
A. 
?
B. 
C. 
D. 
?