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Lesson 11: Algebra I #1.1a, What are Algebraic expressions

Algebra 1
Lesson 11:
Lesson 11: Algebra I #1.1a, What are Algebraic expressions
Lesson 11: Algebra I #1.1a, What are Algebraic expressions

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Question 1 of 10

1. Question

What is a variable in algebra?

A letter that takes the place of an unknown number
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A fixed number that never changes value
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The mathematical symbol used for division
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The final solved answer of an equation
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Question 2 of 10

2. Question

Which of the following is the key feature that distinguishes an equation from an algebraic expression?

An equation must contain fractions.
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An equation has an equal sign, while an algebraic expression does not.
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An equation contains only numbers and no variables.
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An algebraic expression cannot be evaluated.
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Question 3 of 10

3. Question

Why is the expression ‘2 + 3’ NOT considered an algebraic expression?

It contains an addition sign.
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It does not contain an equal sign.
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It does not contain at least one variable.
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It can be easily simplified to a single number.
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Question 4 of 10

4. Question

Which of the following is an example of an algebraic expression?

12 – 7 = 5
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4xy / 2
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1/3 * 1/3 = 1/9
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2 + 3
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Question 5 of 10

5. Question

Evaluate the algebraic expression ‘n – 5’ for n = 15.

5
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10
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15
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20
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Question 6 of 10

6. Question

In the term ‘7x’, what is the mathematical name for the number 7?

Variable
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Coefficient
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Obelus
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Vinculum
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Question 7 of 10

7. Question

Why is the standard symbol ‘x’ often avoided for multiplication in algebra?

Because it is confusing to write on a computer.
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Because it can be easily confused with the variable x.
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Because it only applies to whole numbers.
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Because it is not recognized as a valid mathematical symbol.
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Question 8 of 10

8. Question

What is the proper mathematical term for the fraction line?

Obelus
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Vinculum
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Coefficient
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Variable
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Question 9 of 10

9. Question

Evaluate the expression ‘n + 2 + n’ for n = 3.

5
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7
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8
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11
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Question 10 of 10

10. Question

According to the lesson, how do whole numbers differ from natural numbers?

Whole numbers include negative numbers, while natural numbers do not.
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Whole numbers include fractions and decimals, while natural numbers do not.
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Whole numbers include the number 0, while natural numbers are counting numbers starting at 1.
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Whole numbers only include even numbers, while natural numbers include odd numbers.
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