Find an explicit formula for an.-6, -5, -4, -3, -2, . . .
A. an = n - 7
B. an = n + 6
C. an = n - 6
D. an = n - 5
Answer: A
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In a certain city there is a river running through the middle of the city. There are three islands and nine bridges as shown in the figure below.
In the graph that models this situation, the degree of the vertex that represents the North Bank is
A. 3. B. 1. C. 4. D. 2. E. none of these
Using the horizontal-line test, determine whether the function is one-to-one.
A. one-to-one B. not one-to-one
Find an equation in slope-intercept form of the line satisfying the specified conditions.Through (8, 0), parallel to -3x + 5y = -19
A. y = 
x + 0
B. y = - 
x - 
C. y = 
x - 
D. y = - 
x + 
Factor by grouping.12x3 + 20x2 + 3x + 5
A. (4x2 + 1)(3x + 5) B. (4x2 - 1)(3x + 5) C. (4x + 1)(3x + 5) D. (4x2 + 1)(3x - 5)