There were 120 blackbirds sitting in a tree, but then some blackbirds flew away after that, there were 85 sitting in the tree if b= the amount of blackbirds that flew away , which mathematical sentence express the information above ?

You are on a cycling trip around europe with friends. you check the weather forecast for the first week. these are the temperatures for the week. sun mon tues wed thurs fri sat 16°c 20°c 24°c 28°c 28°c 23°c 15°c what is the mean temperature forecast for the week?