Simplify. Write your answers in the form of a+bi, where a and b are real numbers.
A. 
i
B. 
- 
i
C. 
+ 
i
D. 
Answer: C
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Determine whether the statement is true or false.9 ? 2 - 7 ? 8 ? 0
A. False B. True
Find the numerical value of the expression for 
and 
4x2 + 7x
A. a) 92 b) 1422 B. a) 44 b) 198 C. a) 36 b) 1170 D. a) 60 b) 270
The American Court Reporting Institute finds that the average student taking Advanced Machine Shorthand, an intensive 20-week course, progresses according to the function 
, where Q(t) measures the number of words (per minute) of dictation that the student can take in machine shorthand after t weeks in the course. Sketch the graph of the function Q and answer the following questions:
?
a.What is the beginning shorthand speed for the average student in this course?
b.What shorthand speed does the average student attain halfway through the course?
c.How many words per minute can the average student take after completing this course?
?
A. ?
a.95 words/min
b.170 words/min
c.215 words/min
B. ?
a.85 words/min
b.160 words/min
c.205 words/min
C. ?
a.105 words/min
b.180 words/min
c.225 words/min
Use a grapher to find the vertex or x-intercepts, as indicated, of the quadratic function.Find the x-intercepts of the function f(x) = -14.2x2 + 1.93x + 8.73. Round to two decimal places if needed.
A. (-1.07, 0), (1.19, 0) B. (-0.72, 0), (0.85, 0) C. (-0.85, 0), (0.72, 0) D. No x-intercepts