Write the expression in the standard form a + bi.
3
A. 4
- 4
i
B. 4
+ 4
i
C. -4 - 4
i
D. -4
- 4
i
Answer: D
Mathematics
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Solve the problem.Elissa wants to set up a rectangular dog run in her backyard. She has 28 feet of fencing to work with and wants to use it all. If the dog run is to be x feet long, express the area of the dog run as a function of x.
A. A(x) = 16x2 - x B. A(x) = 15x - x2 C. A(x) = 13x - x2 D. A(x) = 14x - x2
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Factor completely, if possible.x2 + 17x + 18
A. (x + 18)(x - 1) B. Prime C. (x + 6)(x - 3) D. (x - 6)(x + 3)
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Write the first four terms of the recursive sequence.a1 = 7, an = 1 - 
for n ? 2
A. 7, 
, - 
, -7
B. 7, 
, 
, -5
C. 7, 
, - 
, 7
D. 7, - 
, 
, 
Mathematics
Solve the problem.8 different books are to be arranged on a shelf. How many different arrangements are possible?
A. 5040 B. 8 C. 20,160 D. 40,320
Mathematics