8th Grade Math – Posttest Assessment 3
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Question 1 of 22
1. Question
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Question 2 of 22
2. Question
Use the information provided to answer Part A and Part B for question 2.
Filipo is building a rectangular sandbox for his younger brother. The length of the sandbox is 1 foot longer than twice the width of the sandbox. The perimeter of the sandbox is 29 feet.
Part A
Which equation could be used to determine w, the width, in feet, of the sandbox?
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Question 3 of 22
3. Question
Part B
What is the width, in feet, of the sandbox?
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Question 4 of 22
4. Question
The table shows the results of a random survey of students in grade 7 and grade 8. Every student surveyed gave a response. Each student was asked if he or she exercised less than 5 hours last week or 5 or more hours last week.
Based on the results of the survey, which statements are true? Select each correct statement.
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Question 5 of 22
5. Question
Use the information provided to answer Part A through Part D for question 4.
A chemist has two acid solutions. Solution A contains 10% acid, and solution B contains 30% acid. He will mix the two solutions to make 10 liters of a third solution, solution C, containing 25% acid.
The system of equations shown can be used to represent this situation.
Part A
Which statement about the system of equations is true?
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Question 6 of 22
6. Question
Part B
What does the expression 0.30y represent?
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Question 7 of 22
7. Question
Part C
If the system of equations is graphed in a coordinate plane, what is the xcoordinate of the intersection of the two lines?
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Question 8 of 22
8. Question
Part D
What is the number of liters of solution B the chemist mixes with solution A to create solution C containing 25% acid?
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Question 9 of 22
9. Question
Function A and Function B are linear Function A is represented by the table of values. Function B is represented by the equation.
Which statements about the properties of Function A and Function B are true? Select each correct statement.
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Question 10 of 22
10. Question
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Question 11 of 22
11. Question
Use the information provided to answer Part A through Part D for question 7.
Line t is shown in the coordinate plane.
Part A
What is the slope of line t?
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Question 12 of 22
12. Question
Part B
What is the yintercept of line t?
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Question 13 of 22
13. Question
Part C
Line s (not shown) has the same slope and passes through the point (0, 4). Which table represents 4 points on line s?
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Question 14 of 22
14. Question
Part D
Which equation could represent line s?
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Question 15 of 22
15. Question
Relationship A is defined by the equation y = 9x.
Some values of relationship B are shown in the table.
Both relationships represent a direct proportion between x and y.
The rate of change of relationship B is how many units greater than the rate of change of relationship A?
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Question 16 of 22
16. Question
Use the information provided to answer Part A and Part B for question 9.
Eric planted a seedling in his garden and recorded its height each week. The equation shown can be used to estimate the height, h, in inches, of the seedling by the end of each week, w, after it was planted.
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Question 17 of 22
17. Question
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Question 18 of 22
18. Question
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Question 19 of 22
19. Question
Use the information provided to answer Part A and Part B for question 11.
The figure shows a rightcircular cylinder and a rightcircular cone. The cylinder and the cone have the same base and the same height.
Part A
What is the volume of the cone, in cubic feet?
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Question 20 of 22
20. Question
Part B
What is the ratio of the cone’s volume to the cylinder’s volume?
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Question 21 of 22
21. Question
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Question 22 of 22
22. Question
The erosion rate along a section of the coast is approximately 3 feet per year. Which of these best approximates this rate of erosion?
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