Topic 1 Variables and Expressions

What is the numerical expression for the word phrase

21 increased by 14

• 21 + 14

• 21 - 14

• 21 * 14

• 21 ÷ 14

Classify this expression as either numerical or algebraic.

18n - 2

• Numerical expression

• Algebraic Expression

Evaluate the numerical expressions. Decide whether they are equivalent.

37 - 10 and 3 * 9

• not equivalent

• are equivalent

What is an algebraic expression for

49 more than q

• 49 - q

• 49 ÷ q

• 49 + q

You rent a hall for a party. The hall costs $300. The food costs $15 per person. You are not sure how many people will attend. Which quantity is NOT a variable quantity?

• The total cost of the food

• The number of people who will attend

• The cost of the hall.

In the following algebraic expression

8y + 12cd + 4x + 2

what is the 2 in the expression

• the variable

• the coefficient

• the constant

• the term

In the following algebraic expression

8y + 12cd + 4x + 2

how many terms are there?

• 1

• 4

• 2

• 3