Express the sum in sigma notation.7 + 8 + 9 + 10 + 11 + 12
A. 
B. 
C. 
k
D. 
+ 7
Answer: A
Mathematics
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Find all cube roots of the complex number. Leave answers in trigonometric form.64 cis 120°
A. 4
, 4
, 4
B. 4(.7660 + .6428i), 4(-.9397 + .3420i), 4(.1736 - .9848i)
C. 4
, 4
, 4
D. 4(.6428 + .7660i), 4(-.3420 + .9397i), 4(.9848 - .1736i)
Mathematics
Find all specified roots.Fourth roots of -16
A. 2 + i, 2 - i, -2 + i, -2 - i
B. 
+ 
i, 
- 
i, - 
+ 
i, - 
- 
i
C. 8
+ 8
i, 8
- 8
i, -8
+ 8
i, -8
- 8
i
D. 1 + i, 1 - i, -1 + i, -1 - i
Mathematics
Solve the equation for the unknown variable.log2 
= b
A. b = 
B. b = 
C. b = -3
D. b = 3
Mathematics
Solve. Try factoring first. If factoring is not possible or is difficult, use the quadratic formula.6y2 + 17y + 12 = 0
A. - 
, - 
B. 
, - 
C. 
, 
D. - 
, - 
Mathematics