-3.7+1.25-0.55= -3. How do I get this answer?

Renita analyzed two dot plots showing the snowfall during the winter months for city a and for city b. she found that the median snowfall is 5 inches less in city a than in city b. the mean snowfall is about 2 inches less in city a than in city b. which explains why there is a difference in the measures of center for the sets of data?

True or false? many triangular shapes can be circumscribed about a given circle

Match each expression with its simplified form.