# Lesson 1 Variable Expressions

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| By Tcourtney
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Tcourtney
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Quizzes Created: 1 | Total Attempts: 144
Questions: 5 | Attempts: 144

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Variable Expressions
Language of math

• 1.

### Which one do you like?

• A.

4-x

• B.

X-4

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)

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

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

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

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

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