Sketch the surface z = f(x,y).f(x, y) = 
A. 
B. 
C. 
D. 
Answer: A
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Solve the problem.A moving firm charges a flat fee of $45 plus $40 per hour. Let y be the cost in dollars of using the moving firm for x hours. Find the slope-intercept form of the equation.
A. y = 40x + 45 B. y = 45x - 40 C. y = 40x - 45 D. y = 45x + 40
Use the square root property to solve the equation. 
2 = 
A. 
B. 
C. 
D. 
Find the indicated roots.Fifth roots of i; trigonometric form
A. i, cos 72° + i sin 72°, cos 144° + i sin 144°, cos 216° + i sin 216°, cos 288° + i sin 288° B. -i, cos 36° + i sin 36°, cos 108° + i sin 108°, cos 252° + i sin 252°, cos 324° + i sin 324° C. i, cos 18° + i sin 18°, cos 162° + i sin 162°, cos 234° + i sin 234°, cos 306° + i sin 306° D. 1, cos 36° + i sin 36°, cos 108° + i sin 108°, cos 252° + i sin 252°, cos 324° + i sin 324°
Evaluate the expression using the given values.
- 
x = -8, y = 4
A. -4 B. 4 C. 12 D. -12