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1. |
Which equation has a graph that is parallel to the graph of 4x - 2y = 1? |
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A. |
y = 2x - 3 |
B. |
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C. |
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D. |
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Hint |
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2. |
State the slope and y-intercept of the graph of -y = -0.9x + 4. |
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A. |
m = -4, b = 0.9 |
B. |
m = 0.9, b = -4 |
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C. |
m = -0.9, b = 4 |
D. |
m = 4, b = -0.9 |
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Hint |
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3. |
Find the slope-intercept form of an equation of the line that has a slope of  and passes through (8,2). |
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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. |
When two lines have different slopes, the graphs of the equations are _________ |
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A. |
the same line. |
B. |
intersecting lines. |
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C. |
parallel lines. |
D. |
horizontal lines. |
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Hint |
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5. |
Solve the system of equations by graphing. 
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A. |
(2, 6) |
B. |
(-6, 2) |
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C. |
(2, -6) |
D. |
(6, 2) |
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Hint |
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6. |
Use the substitution method to solve m - n = 7 and 3m + 2n = 6. |
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A. |
(4, -3) |
B. |
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C. |
(-5, 2) |
D. |
(-3, -10) |
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Hint |
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7. |
Use the elimination method to solve the system of equations. 
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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. |
Which coordinates are not of the vertices of the feasible region for the system of inequalities? 
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A. |
(5, 1) |
B. |
(0, 6) |
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C. |
(5, 4) |
D. |
(2, 4) |
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Hint |
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9. |
A baker earns 15¢ profit per glazed doughnut g, and 40¢ profit per jelly doughnut j. If a customer wants to buy no more than a dozen doughnuts and wants to try at least one of each kind, what is the maximum profit the baker can earn? |
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A. |
$1.80 |
B. |
$4.55 |
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C. |
$4.80 |
D. |
$3.30 |
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Hint |
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10. |
Use substitution to solve the system of equations.
5x + 5y = -30
2x - y = 15 |
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A. |
(3, -9) |
B. |
no solution |
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C. |
(21, 27) |
D. |
infinitely many solutions |
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Hint |
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11. |
Which point is not a solution for the system of inequalities? |
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A. |
(2, -5) |
B. |
(-3, 7) |
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C. |
(3, -3) |
D. |
(-2, -7) |
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Hint |
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12. |
Which graph is the graph of the system of inequalities?
y > 2x
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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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13. |
Which equation describes the line that contains the points (6, 2) and (12, 4)? |
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A. |
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B. |
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C. |
y = -3x |
D. |
y = 3x |
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Hint |
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14. |
Write the slope-intercept form of an equation for the line that passes through (-8, -1) and is parallel to the graph of  |
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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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15. |
A phone company charges for service as follows: they charge a certain amount for a visit, and then they charge a certain amount per hour after that. If a three-hour service visit costs $220, and a job that takes an hour and a half costs $145, how much is the cost of a visit before the amount of time spent is factored in? |
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A. |
$25 |
B. |
$217 |
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C. |
$50 |
D. |
$70 |
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Hint |
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16. |
Which is true for the following system of equations?
3x -  y = 1
x + 2y = 7. |
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A. |
y = x |
B. |
y < x |
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C. |
y > x |
D. |
cannot be determined from information given |
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Hint |
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17. |
Solve  for n by the method of determinants. |
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A. |
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B. |
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D. |
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Hint |
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18. |
Solve  by the method of determinants. Round to the nearest hundredth. |
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A. |
(1.68, 4.40) |
B. |
(1.86, 2.20) |
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C. |
(-1.86, -2.20) |
D. |
(2.46, 1.20) |
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Hint |
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