Question

Naomi has 45 minutes to get ready for school. She spends x minutes getting dressed. Write an expression that represents the number of minutes she still has to get ready.

Answer 1

Hi!

Notice that the question is saying she has a total of 45 minutes to get ready. It is NOT saying that she spent 45 minutes getting dressed.

Also notice that it asks for an expression. Expressions don't have equal signs.

If she spends x minutes getting dressed, we need to subtract that from the total time (45 minutes) to know how much time she has left. Therefore, your answer is:

$45-x$