Chapter 4 Mastering Algebraic Expressions
Quiz
•
Information Technology (IT)
•
7th Grade
•
Medium
Hengky Tan
Used 10+ times
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25 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Evaluate: 3(x + 4) when x = 2.
6
12
24
18
Answer explanation
To evaluate 3(x + 4) when x = 2, substitute 2 for x: 3(2 + 4) = 3(6) = 18. Thus, the correct answer is 18.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Combine like terms: 5x + 3x - 2 + 7.
8x - 2
8x + 5
6x + 5
5x + 9
Answer explanation
To combine like terms, add the coefficients of x: 5x + 3x = 8x. Then, combine the constants: -2 + 7 = 5. Thus, the final expression is 8x + 5, which matches the correct answer.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Use the distributive property: 4(2y + 3).
8y + 6
4y + 3
8y + 12
6y + 9
Answer explanation
To apply the distributive property, multiply 4 by each term inside the parentheses: 4 * 2y = 8y and 4 * 3 = 12. Thus, 4(2y + 3) = 8y + 12, making '8y + 12' the correct answer.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Simplify: 6a + 4b - 2a + 3b.
4a + 7b
8a + 4b
2a + 5b
6a + 7b
Answer explanation
Combine like terms: (6a - 2a) + (4b + 3b) = 4a + 7b. Thus, the simplified expression is 4a + 7b, which is the correct choice.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Evaluate: 2(3 + y) when y = 5.
12
16
20
10
Answer explanation
To evaluate 2(3 + y) when y = 5, substitute y: 2(3 + 5) = 2(8) = 16. Thus, the correct answer is 16.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Combine like terms: 7m - 2n + 3m + n.
4m - 3n
10m - n
10m + 2n
5m - n
Answer explanation
To combine like terms, add the coefficients of 'm' and 'n'. For 'm': 7m + 3m = 10m. For 'n': -2n + n = -n. Thus, the result is 10m - n, which matches the correct answer.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Use the distributive property: 5(3x - 2).
15x - 10
15 - 10x
3(5x - 2)
5x - 2
Answer explanation
Using the distributive property, multiply 5 by each term inside the parentheses: 5 * 3x = 15x and 5 * -2 = -10. Thus, 5(3x - 2) simplifies to 15x - 10, which is the correct answer.
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