Find the the length of the unknown side round to the nearest tenth

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?

Could someone with number 1 and 2

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?