Translate the phrase to an algebraic expression. Let x represent the unknown number.The quotient of 27 times a number and -7.
A. 27x - 7
B. 27x + 7
C. 
D. 
Answer: C
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Use the graph of the function f(x) to locate the local extrema and identify the intervals where the function is concave up and concave down.
A. Local minimum at x = 0; local maximum at x = 2; concave up on (0, ?); concave down on (-?, 0) B. Local minimum at x = 2; local maximum at x = 0; concave down on (0, ?); concave up on (-?, 0) C. Local minimum at x = 0; local maximum at x = 2; concave down on (0, ?); concave up on (-?, 0) D. Local minimum at x = 2; local maximum at x = 0; concave up on (0, ?); concave down on (-?, 0)
The graph of a function f is given. Use the graph to answer the question.How often does the line y = 5 intersect the graph?
A. once B. twice C. three times D. does not intersect
Simplify. Write your answers in the form of a+bi, where a and b are real numbers.
+ 
A. 
+ 
i
B. - 
+ 
i
C. 
- 
i
D. - 
- 
i
In many applications, it is often necessary to write expressions in the form 
, where c is a constant and n is an integer. Write the expression below in this form.
?
?
A. 
B. 
C. 
D. 
E. 