# Naomi has 45 minutes to get ready for school. She spends x minutes getting dressed. How do you write an expression that represents the number of minutes she still has to get ready?

Jan 12, 2017

You subtract the number of minutes Naomi already used getting dressed from the total number of minutes she has.

#### Explanation:

From the quesrion, we know that:

a) Naomi has $45$ minutes to get ready.
b) She has already spent $x$ minutes.

The number of minutes she still has to get ready would be $45 - x$ minutes.