Question

Which of the following math statements contain variable(s)? Check all that apply.

A) 19

B) 13

C)
x−13

D)

9−1

E)
19−10=9

Answer 1

Only statement C, x−13, contains a variable. The other statements, A) 19, B) 13, D) 9−1, and E) 19−10=9, do not contain variables as they are statements with constant numbers.

Step-by-step explanation:

When looking at various math statements to identify which ones contain variables, we're looking for symbols that represent unknown or changeable values. A variable is typically represented by a letter or symbol and can vary in value.

• A) 19 contains no variables as it is a constant number.
• B) 13 is also a constant number, with no variables present.
• C) x−13 contains a variable, represented by x, which means this expression can take on different values depending on the value of x.
• D) 9−1 is a simple arithmetic expression and does not have any variables.
• E) 19−10=9 is an equation stating a fact about numbers and does not have a variable.

Therefore, only statement C x−13 contains a variable.