Lesson 1 Variable Expressions

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| By Tcourtney

Tcourtney

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Quizzes Created: 1 | Total Attempts: 146

Questions: 5 | Attempts: 146 | Updated: May 3, 2024

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Variable Expressions
Language of math

Questions and Answers

1.

Which one do you like?
- A.
  
  4-x
- B.
  
  X-4
Correct Answer
B. X-4

Explanation
The expression "four less than a number" implies that we are subtracting 4 from the number. Therefore, the correct expression would be x-4.

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2.

The expression "twice the product of 3 and x" is the same as which of the following?
- A.
  
  2+(3x)
- B.
  
  (2+3)x
- C.
  
  6x
- D.
  
  2(3+x)
Correct Answer
C. 6x

Explanation
The expression "twice the product of 3 and x" means multiplying 3 and x together, and then multiplying the result by 2. This can be written as 2 * (3 * x), which simplifies to 6x.

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3.

Which of the following verbal expressions does NOT indicate multiplication
- A.
  
  Product
- B.
  
  Twice something
- C.
  
  Times
- D.
  
  More than
- E.
  
  Of
Correct Answer
D. More than

Explanation
The phrase "more than" does not indicate multiplication. It implies a comparison or addition of quantities, rather than the multiplication of two or more numbers.

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4.

Which of the following is a verbal expression for 3x - 4.
- A.
  
  4 less than the product of 3 and x
- B.
  
  4 less than the quotient of 3 and x
- C.
  
  The quotient of 3 and x decreased by 4
- D.
  
  The product of 3 and x increased by 4
Correct Answer
A. 4 less than the product of 3 and x

Explanation
The correct answer is "4 less than the product of 3 and x" because the expression 3x - 4 can be interpreted as taking the product of 3 and x and then subtracting 4 from it.

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5.

Evaluate 3x + 12 - 24/x when x is 8.
- A.
  
  12
- B.
  
  36
- C.
  
  1.5
- D.
  
  33
Correct Answer
D. 33

Explanation
To evaluate the expression 3x + 12 - 24/x when x is 8, we substitute the value of x into the expression. Plugging in x = 8, we get 3(8) + 12 - 24/8. Simplifying further, we have 24 + 12 - 3, which equals 33. Therefore, the correct answer is 33.

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Current Version
May 03, 2024

Quiz Edited by
ProProfs Editorial Team
Jan 14, 2010

Quiz Created by
Tcourtney

Lesson 1 Variable Expressions

Which one do you like?

The expression "twice the product of 3 and x" is the same as which of the following?

Which of the following verbal expressions does NOT indicate multiplication

Which of the following is a verbal expression for 3x - 4.

Evaluate 3x + 12 - 24/x when x is 8.