In math, what is the definition of "variable"?

In mathematics, a variable is a letter that represents any number. Therefore, variables are often used to represent unknown numbers.

For example, the image I attached is a jar filled with coins. We can use "X" to represent the number of coins in the jar since we don't know how many there are.

a

step-by-step explanation:

hey there!

if she's saving for six months, let's divide the total number we need for the trip by six, dividing it into the amount that needs to be saved for each month.

500 ÷ 6 =

she needs to save at least this amount each month, so we should use this symbol: ≥

let x be the amount she saves each month.

your final answer is x ≥

hope this !