решить задачу уравнением.Сколько девочек в классе,если всего 24 ученика,а мальчиков в двое больше,чем девочек?

Луна притягивается к Земле с силой F=2x10 в 20 степени Hьютонов.Определите массу Луны.

могут ли обходится без цитоскелета растительная и животная клетка. почему?

Очень нужно! Много пунктов даю)

Put each of the following words or phrases into its correct place in the passage below.

Air vents, cabin, captain, carry, co-pilot, crew, cruising speed, distances, flight, flight engineer, galley, jet-propelled, passenger, passenger list, safety belts, seats, size, tourist, stewardesses, take-off, trip.

Airliner
Airliners, or 1.….. planes, differ from light planes not only in 2….. but also in speed and equipment. They are designed to 3….. a greater number of people over longer 4….. without stopping to refuel.
A passenger airliner has a comfortable 5….. with soft carpets, adjustable upholstered 6….., washrooms, and individual 7….. and reading lights. It has a 8….. for preparing food. Many airlines offer 9….., or economy class service, which costs less than first-class travel.
The 10….. of four-engine airliners range from about 350 mph for propeller-driven planes to more than 500 mph for 11….. planes.
The 12….. of an airliner works as a team to make the trip smooth and pleasant. While the passengers take their seats, the pilot or 13….., co-pilot, flight engineer, and stewardesses prepare the plane for 14….. . The pilot, assisted by the 15….., checks the instruments and tests the controls. The 16….. checks the other mechanical equipment. The stewardesses check the 17….., make sure that the passengers fasten their 18….. for 19….. . Later, the 20….. distribute magazines, serve meals, and do other things to make the 21….. enjoyable.