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1. |
The revenue for the sale of x objects is r(x) = 8x. The cost of manufacturing x objects is c(x) = 0.5x + 300. Write the profit function. |
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A. |
8.5x + 300 |
B. |
8.5x - 300 |
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C. |
7.5x + 300 |
D. |
7.5x - 300 |
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Hint |
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2. |
Jane is opening a home-based business. She determined that she will need $4500 to buy a computer and supplies to start. She expects expenses for each following month to be $800. Write an equation that models the total expense y after x months. |
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A. |
y = 800x + 4500 |
B. |
y = 4500x - 800 |
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C. |
y = 800x - 4500 |
D. |
y = 4500x + 800 |
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Hint |
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3. |
Which is the graph of the inequality x + 2y - 2 0? |
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A. |
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B. |
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C. |
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D. |
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Hint |
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4. |
Which is the graph of the inequality y |x - 3|? |
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A. |
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B. |
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C. |
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D. |
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Hint |
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5. |
Find the image of after Rot90 · Ry-axis if the vertices are A(2, -3), B(6, -3), and C(2, 5). |
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A. |
A'(-3, -2), B'(-3, -6), C'(-5, -2) |
B. |
A'(3, 2), B'(3, 6), C'(5, -2) |
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C. |
A'(3, -2), B'(3, -6), C'(-5, -2) |
D. |
A'(-3, 2), B'(-3, 6), C'(5, 2) |
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Hint |
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6. |
Which of the following shows the system of equations using a matrix equation? |
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A. |
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B. |
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C. |
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D. |
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Hint |
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7. |
Which is the graph of f(x) = x2 - 3 and its inverse? |
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A. |
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B. |
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C. |
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D. |
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Hint |
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8. |
Suppose y varies directly as x and y = 13 when x = 7. Find the constant of variation and write an equation. |
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A. |
k = and y = x |
B. |
k = and y = 13 · 7x |
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C. |
k = and y = x |
D. |
k = and y = 13 · 7x |
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Hint |
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9. |
In the equation x3 + x2 + 4x + 4 = 0, how many times does the graph of the related function cross the x-axis? |
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A. |
0 |
B. |
2 |
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C. |
3 |
D. |
1 |
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Hint |
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10. |
Solve the equation 2x2 -x + 4 = 0 by any method. |
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A. |
i |
B. |
i |
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C. |
1 i |
D. |
i |
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Hint |
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11. |
Determine between which consecutive integers the real zeros of f(x) = x4 - 4x2 + x - 3 are located. |
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A. |
between -2 and -1 and between 2 and 3 |
B. |
between -3 and -2 and between 5 and 6 |
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C. |
between -3 and -2 and between 2 and 3 |
D. |
between -4 and -3 and between 3 and 4 |
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Hint |
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12. |
Approximate the real zeros of the function f(x) = 2x2 + 4x + 1 to the nearest tenth. |
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A. |
-1.8 and -0.2 |
B. |
-1.7 and -0.3 |
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C. |
-1.8 and -0.4 |
D. |
-1.6 and -0.2 |
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Hint |
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13. |
Solve = 3. |
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A. |
3 |
B. |
-1 |
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C. |
2 |
D. |
2, 3 |
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Hint |
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14. |
Which equation has an undefined slope? |
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A. |
y = 4x + 2 |
B. |
x = 4 |
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C. |
y = 4x |
D. |
y = 4 |
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Hint |
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15. |
Determine two points that appear to represent the data in the scatter plot. Then find and interpret the slope. |
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A. |
Paul's test scores improve an average of 15 points with each test. |
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B. |
Paul's test scores are neither increasing nor decreasing. |
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C. |
Paul's test scores improve an average of 5 points with each test. |
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D. |
Paul's test scores improve an average of 3 points with each test. |
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Hint |
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16. |
Find the inverse of . |
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A. |
does not exist |
B. |
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C. |
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D. |
0 |
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Hint |
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17. |
Complete the graph so it is symmetric about the origin. |
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A. |
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B. |
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C. |
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D. |
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Hint |
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18. |
Which is an odd function? |
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A. |
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B. |
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C. |
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D. |
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Hint |
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19. |
Which is the graph of y ? |
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A. |
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B. |
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C. |
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D. |
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Hint |
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20. |
Locate the extrema for the graph y = f(x). |
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A. |
There is a relative minimum at (4,4) and a relative maximum at (0,0) |
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B. |
There is an inflection point at (2,2) |
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C. |
There is a relative maximum at (4,4) and a relative minimum at (0,0) |
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D. |
There is an absolute maximum at (4,4) and an absolute minimum at (0,0) |
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Hint |
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