Сторона квадрата 7см. Найдите стороны прямоугольника, имеющего такой же периметр, если известно, что одна сторона прямоугольника, больше другой на 2см. Вычислите площадь прямоугольника

a)cos2x-5sinx+6=0 б)3cos2x=4-11cosx в)cos2x=6sinx-5=0 г)cos2x-5sinx+6=0

СРОЧНО ПОМОГИТЕ ПОЖАЛУЙСТА СОЕДИНИТЬ ЦЫФРУ С БУКВОЙ ПРАВИЛЬНО!

1. This defeat did not decrease the

2. Her persistence in achieving her goals

3. She has shown great courage

4. You should have more confidence

5. Is it important to keep discipline

6. It’s sometimes difficult for me

7. We’ve made a commitment to help him,

8. Some jobs give you the opportunity

9. Someone has got to take

10. His ambition was always

a. to focus my mind on the task.

b. to become a successful student.

c. and we will.

d. enthusiasm of our basketball team.

e. responsibility for the failure of the deal.

f. in accomplishing her dreams.

g. in your own abilities.

h. was rewarded: she entered the college.

i. so that everybody can learn?

j. of demonstrating your creativity.

почему реакция не может протекать?

1)Na3PO4+KCl ->

2)NaCl+Ca(OH)2 ->