Factor the perfect square trinomial completely.z2 + 8z + 16
A. (z + 8)(z - 8)
B. (z + 4)2
C. (z + 4)(z - 4)
D. (z - 4)2
Answer: B
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Write the exponential expression below in simplest form.
?
A. 
B. 
C. 
D. ?
E. 
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 satisfying x2 + y2 = 81; range: real numbers 0 ? z ? 9; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 9
B. Domain: all points in the xy-plane; range: real numbers 0 ? z ? 9; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 9
C. Domain: all points in the xy-plane; range: all real numbers; level curves: circles with centers at 
D. Domain: all points in the xy-plane satisfying x2 + y2 ? 81; range: real numbers 0 ? z ? 9; level curves: circles with centers at (0, 0) and radii r, 0 < r ? 9
Write the number in trigonometric form. Let 0° ? ? < 360°.4
A. 4(cos 90° + i sin 90°) B. 4(cos 0° + i sin 0°) C. 4(cos 270° + i sin 270°) D. 4(cos 180° + i sin 180°)
Translate the sentence into an equation and solve it.The sum of fifteen and four times n is the same as the difference between three times n and seven. Find n.
A. 15 + 4n = 3n - 7,n = -22 B. 15 - 4n = 7 - 3n, n = 8 C. 15 + 4n = 3n - 7, n = 8 D. 15 + 4n = 7 - 3n, n = -1