Yesterday, the outside temperature in the morning was 6.2°C. By lunchtime, the temperature had risen 12.9°C.
In the evening, the temperature dropped 7.5°C.
What was the outside temperature in the evening?

Taking algebra two apex courses and need with these questions

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?