Which is NOT a correct statement about variables? A. Variables are letters or symbols.
B. Variables can represent unknown quantities.
C. Variables can appear in numerical expressions.
D. Variables can represent quantities that change depending on the situation.

A

Step-by-step explanation:

there is no symbols, it's just letters

x=half

step-by-step explanation:

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.