20+(20+3) составить задачу

Вы постепенно входите в море. Изменяется ли выталкивающая сила по мере вашего погружения ? А когда она достигает максимального значения?

log7(2-3x)<1

вычислите sin(-п/2)

уравнение 4x-9/x+1=5

вычислить картинку

Correct (+) or not (-) пример John cans swim (-) I must go now (+) 1)I dont must see Andrew today 2)Anna cant to speak English 3)Last year I must sell my car 4)Would you like to have some coffe? 5)It may rain tomorrow 6)I mustnt work on Saturdays, but I can if l like Circle the correct answers 1. If you travel to Morania you can / should / must have a visa. 2. You shouldn't / don't have to / couldn't laugh at old people. 3. Passengers must / must not / should not smoke in the toilets. 4. I think you should / must / may eat less and take more exercise. 5. You mustn't / may not / needn't tell me if you don't want to. 6. You may / have to drive on the left in Britain.

второе уравнение. x^{2}-2х=0