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1. |
State the slope and y-intercept of the graph of -y = -0.9x + 4. |
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A. |
m = -0.9, b = 4 |
B. |
m = -4, b = 0.9 |
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C. |
m = 4, b = -0.9 |
D. |
m = 0.9, b = -4 |
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Hint |
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2. |
The system of equations on the graph shown is |
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A. |
consistent and independent. |
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B. |
inconsistent. |
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C. |
consistent. |
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D. |
consistent and dependent. |
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Hint |
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3. |
Use the substitution method to solve m - n = 7 and 3m + 2n = 6. |
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A. |
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B. |
(-3, -10) |
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C. |
(-5, 2) |
D. |
(4, -3) |
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Hint |
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4. |
What is the solution of the system of inequalities? 
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A. |
region 3 |
B. |
region 1 |
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C. |
region 2 |
D. |
region 4 |
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Hint |
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5. |
Find the value of 63. |
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A. |
729 |
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B. |
36 |
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C. |
216 |
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D. |
18 |
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Hint |
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6. |
Selena has 31 days to complete her quilt for the county fair. The blue squares in the quilt can be sewn at a rate of 4 squares per day, and the white squares at a rate of 7 squares per day. The quilt can have up to 96 squares total. The blue fabric b costs about $0.80 per square and the white fabric w costs about $1.20 per square. Selena wants to keep costs at a minimum. Write the function that describes the cost of the quilt. |
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A. |
f(b, w) = 4b + 7w |
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B. |
96 = 0.80b + 1.20w |
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C. |
96 = 4b + 7w |
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D. |
f(b, w) = 0.80b + 1.20w |
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Hint |
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7. |
Use substitution to solve the system of equations.
5x + 5y = -30
2x - y = 15 |
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A. |
(21, 27) |
B. |
(3, -9) |
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C. |
no solution |
D. |
infinitely many solutions |
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Hint |
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8. |
Which system of inequalities is graphed below? |
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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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9. |
Which equation describes the line that contains the points (-1, -8) and (-9, -21)? |
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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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10. |
Write the slope-intercept form of an equation for the line that passes through (-4, -26) and is parallel to  |
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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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11. |
Graph the line through (2, 3) that is perpendicular to the line with equation 2x + 5y = 1. |
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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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12. |
Find the slope of the line below. |
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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. |
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. |
$217 |
B. |
$70 |
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C. |
$25 |
D. |
$50 |
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Hint |
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14. |
Which of the following systems of equations is not consistent and independent? |
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A. |
2y + 4x = 3 7y + 5x = 18 |
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B. |
y + 4x = 10 6y + 24x = 60 |
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C. |
7y + x = 9 3y + 9x = 4 |
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D. |
–y – 5x = 1 4y + 3x = 8 |
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Hint |
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15. |
Solve the system of equations. –2x + 3y = 7
4x – 6y = 8. |
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A. |
y = –22, x = 29.5 |
B. |
y = –22, x = –31 |
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C. |
no solution |
D. |
y = –22, x = –36.5 |
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Hint |
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16. |
Solve the system of equations 3x – 5y = 4
–2x + 4y = 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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17. |
Solve  for n by the method of determinants. |
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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. |
Two sides of an angle are contained in lines whose equations are  and  Find the coordinates of the vertex of the angle. Round to the nearest hundredth. |
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A. |
(1.89, 3.26) |
B. |
(1.79, 1.06) |
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C. |
(2.76, 3.16) |
D. |
(1.78, -1.16) |
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Hint |
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