Mila spends a winter day recording the temperature once every three hours for science class. At 9 am, the temperature was -1.6°F. Between 9am and noon, the temperature rose 6.6°F. Between noon and 3pm, the temperature increased by 2.8°F. Between 3pm and 6pm, the temperature went down 10.5°F. What was the temperature at 6pm?

We can conclude the following information:

Every 3 hours the temperature changes.

At 9 AM, the temperature was -1.6°F:

9 AM = -1.6°F =>

Between 9 AM and noon, the temperature rose 6.6°F:

12 PM = -1.6 + 6.6 = 5°F =>

Between noon and 3 PM, the temperature increased by 2.8°F:

3 PM = 5 + 2.8 = 7.8°F =>

Between 3 PM and 6 PM, the temperature went down 10.5°F:

6 PM = 7.8 - 10.5 = -2.7°F

What was the temperature at 6 PM?

-2.7°F

answer: the answer to your question is parallel

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.