Дан треугольник ABC. PK||AC. Найдите x. AC = 12 KP=4 PB=5 AP = x

Настенные часы начинают бить каждые четверть часа. Сколько раз часы начинают бить за январь месяц?

Simple Present Exercise 01Change the verb into the correct form, then press "Check" to check your answers. Use the "Hint" button to get a free letter if you don't know. Note that you will lose points if you ask for hints!– 1. I usually (go) to school. 2. They (visit) us often. 3. You (play) basketball once a week. 4. Tom (work) every day. 5. He always (tell) us funny stories. 6. She never (help) me with that! 7. Martha and Kevin (swim) twice a week. 8. In this club people usually (dance) a lot. 9. Linda (take care) of her sister. 10. John rarely (leave) the country. 11. We (live) in the city most of the year. 12. Lorie (travel) to Paris every Sunday. 13. I (bake) cookies twice a month. 14. You always (teach) me new things. 15. She (help) the kids of the neighborhood.

приведите примеры функций: ограниченных сверху, ограниченных снизу

3sin^2 x + 5sin 2x + 7cos^2 x = 0 помогите пожалуйста