Algebraic expressions

What are the variables of  
7x + 6y - 9

• 6,7
• 9
• 6y, 7x
• x, y

What are the coefficients in the expression
8a + b + 9?

• 8 only
• 1 and 8
• 8 and 9
• 1, 8, and 9

A _____________ is a symbol, usually a letter that stands for a number. 

• coefficient
• algebraic expression
• variable
• term

Identify the constant of the algebraic expression:

3x + 5

• 3

• x

• 5

• 3x and 5

A variable is . . .

• an awesome number

• a number represented by a letter

• an infinite number

• a number multiplied by another number

What are the variables in the following expression?

• 3, 4, 1 and 7
• z, x and y
• + and -
• 15

How is the number 9 best described in the expression
9m + 3n + 4

• coefficient
• variable
• constant
• term

What is the difference between a numeric expression and an algebraic expression?

• An algebraic expression only has numbers.

• A numeric expression cannot be solved.

• An algebraic expression has variables and a numeric expression does not.

• A numeric expression has variables and an algebraic expression does not.

A coefficient is __________.

• the variable
• a constant
• an exponent
• the number that comes before the variable

Identify the terms in the algebraic expression: n + 3m - 15

• n and m

• n and 3m

• n, 3m, and 15

• n + 3m - 15