# algebra

posted by
**garrett**
.

Which properties did Carmen use to solve the following problem?

17 + (45 + 23)

17 + (23 + 45)

(17 + 23) + 45

40 + 45

85

posted by
**garrett**
.

Which properties did Carmen use to solve the following problem?

17 + (45 + 23)

17 + (23 + 45)

(17 + 23) + 45

40 + 45

85