
8th Grade math quiz
Quiz
•
Mathematics
•
8th Grade
•
Practice Problem
•
Hard
Haydin Henschel
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the value of (3x + 5) when (x = 2)?
11
10
9
8
Answer explanation
Substitute x = 2 into the expression (3x + 5) to get (3*2 + 5) = 6 + 5 = 11. Therefore, the value is 11.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Simplify the expression: (4(3y + 2) - 5).
(12y - 3)
(12y + 3)
(12y - 8)
(12y + 8)
Answer explanation
To simplify the expression, distribute 4 into (3y + 2) to get 12y + 8. Then subtract 5 to get the final result of 12y - 8.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Solve for (x): (5x - 3 = 12).
x=1
x=2
x=3
x=4
Answer explanation
To solve for x, first add 3 to both sides: 5x = 15. Then divide by 5 to get x = 3. Therefore, x=3 is the correct answer choice.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the coefficient of (x) in the expression (7x - 2 + 4x)?
11
7
4
9
Answer explanation
To find the coefficient of (x), combine like terms: 7x + 4x = 11x. Therefore, the coefficient of (x) is 11.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is an equivalent expression to (3(a + b))?
(3a + 3b)
(3a + b)
(a + 3b)
(3a - b)
Answer explanation
To find the equivalent expression, distribute the 3 to both terms inside the parentheses: 3(a + b) = 3a + 3b. Therefore, the correct equivalent expression is (3a + 3b).
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the result of (6m + 2m - 4m)?
4m
3m
2m
m
Answer explanation
To find the result, combine like terms: 6m + 2m - 4m = 4m. Therefore, the result is 2m.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If (2(x - 3) = 14), what is (x)?
10
8
7
5
Answer explanation
To find x, first distribute the 2: 2x - 6 = 14. Then, isolate x by adding 6 to both sides: 2x = 20. Finally, divide by 2 to get x = 10. Therefore, the correct answer is 8.
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