Math Missing Variables

What are the variables in the following expression?

• 3, 4, 1 and 7

• z, x and y

• + and -

• 15

In this expression what is the variable? 
5 + y 

• q

• 5

• y

• +

What is the variable in 3x - 5

• x

• 5

• 3

What are the variables in 3x + y

• 3x

• x,y

• x

• y

Which of the following answer choices is NOT an example of a variable?

• 8

• x

• u

• n

Write the following statement as a mathematic expression with variable(s):

> The difference of 16 and K is seven.

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Write the following statement as a mathematic expression with variable(s):

> Ben has 35 crisps. That is 7 times more than Ryan has.

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What are variables in math?

• Letters

• Numbers

• Expressions

In this term, 3a²bc, what are the variables?

• 3 and 2

• 3

• 2

• a, b, and c

Solve for x

• x=6

• x =1/6

• x = 7

• x=9