Simplify the expression. Include absolute value bars where necessary.
A. x + 1
B. 
+ 1
C. ±x + 1
D. 
Answer: D
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Convert the length as indicated.7 feet to inches
A. 84 in. B. 28 in. C. 252 in. D. 21 in.
Solve the triangle.
A. C = 75°, c ? 4.2, a ? 2.2 B. C = 15°, c ? 1.1, a ? 2.2 C. C = 15°, c ? 3.8, a ? 4.2 D. C = 75°, c ? 4.2, a ? 3.8
Find 
. Write the answer in polar form with the argument between 0° and 360°z1 = 10(cos 45° + i sin 45°), z2 = 5(cos 15° + i sin 15°)
A. 2(cos 30° + i sin 30°)
B. 
(cos 30° + i sin 30°)
C. 2(cos 45° + i sin 45°)
D. 
(cos 45° + i sin 45°)
?Find the points of inflection and discuss the concavity of the function.
??
?
?
A. ?inflection point at 
; concave downward on 
; concave upward on 
B. ?inflection point at 
; concave upward on 
; concave downward on 
C. ??inflection point at 
; concave downward on 
; concave upward on 
D. ?inflection point at 
; concave upward on 
; concave downward on 
E. ?none of the above