Solve by the quadratic formula. Simplify answers. Use i notation for nonreal complex numbers.x2 + 7x + 2 = 0
A. x = 
B. x = 
C. x = 
D. x = 
Answer: C
Mathematics
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Express the set using the roster notation. The set of the days of the week.
A. {Tuesday, Thursday} B. {Saturday, Sunday} C. {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Sunday} D. {Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday}
Mathematics
Solve the equation exactly in the complex number system.x3 + 125 = 0
A. x = -5, x = 
+ 
, x = - 
- 
B. x = 5, x = 
± 
C. x = - 
, x = 
± 
D. x = -5, x = 
± 
Mathematics
For the given arithmetic series, what is Sn?a1 = 23, d = -3, and n = 15
A. 120 B. 53 C. 60 D. 30
Mathematics
Write an equation that expresses the relationship. Use k for the constant of proportionality.w varies directly as a and inversely as the difference between x and y.
A. w = 
B. w = ka(x - y)
C. w = 
D. w = 
Mathematics