Variable Variables

What are the variables in the expression 3x + y?

• x, y

• 3, x

• y, 3

• x, 3

In the expression 5 + y, what is the variable?

• 5

• y

• +

• =

What are the variables in the expression 4m + n - 10?

• m, n

• 4, 10

• m, 4

• n, 10

What does the term 'coefficient' mean?

• A number that adds to a variable, such as 3 in 3x.

• A number that divides a variable, such as 3 in 3x.

• A number that multiplies a variable, such as 3 in 3x.

• A number that subtracts from a variable, such as 3 in 3x.

In the expression 7 + x - 5, what is the variable?

• 7

• 5

• x

• -5

In the expression 10 - 2y, identify the variable.

• x

• y

• z

• w

In the expression 5p + 4h - 2, which are the variables?

• 5, -2

• p, h

• 4, -2

• 5, 4

What is a variable in mathematics?

• A fixed number that does not change.

• A symbol, often a letter, that represents a number that can change.

• A type of equation used to solve problems.

• A mathematical operation such as addition or subtraction.

Identify the variables in the expression z + 3 - 4.

• 3

• 4

• z

• -1

What is a constant in mathematics?

• A variable that can change value

• A fixed value that does not change, often a number.

• A mathematical operation that varies

• A type of equation that has no solution.