Find the vertex of the parabola and graph it.
A. 
B. 
C. 
D. 
E. 
Answer: B
Mathematics
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Solve.The monthly cost of a certain long distance service is given by the linear function 
where C(t) is in dollars and t is the amount of time in minutes called in a month. Find the cost of calling long distance for 120 minutes in a month.
A. $18.55 B. $20.95 C. $9.60 D. $17.55
Mathematics
Find all real and imaginary solutions.x2 + 7 = 0
A. {
, i
}
B. {±i
}
C. {±
}
D. {
}
Mathematics
Factor.54 - 21x - 20x2
A. (4x + 9)(5x - 6) B. (4x - 9)(5x + 6) C. (4x - 6)(5x + 9) D. (4x - 9)(5x - 6)
Mathematics
Simplify the expression. Assume all variables represent positive numbers.
- 
+ 
A. 
B. - 
C. - 
D. - 
Mathematics