What statement makes the open sentence 49-7x=21 true

When turned about its axis of rotation, which shape could have created this three-dimensional object?

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?

If you could answer these your a life saver