<span>На железнодорожные пути заменили рельсы длиной 8м на новые длиной 12м. Сколько новых рельсов понадобится на замену 180 штук старых рельсов?
</span>180 штук старых рельсов составляют 8·180=1440(м)
на замену 180 штук старых рельсов новых рельсов понадобится 1440/12=120 <span>новых рельсов </span>
Пусть x-ткань 2 вида.
x+1.30м-ткань 1вида.
Всего-3.50м ткани.
Составим уравнение:
x+(x+1.30)=3.50
2x+1.30=3.50
2x=2.20
x=1.10
Из этого исходит, что ткани на шитье брюк хватит, а на пиджак нет.
Ответ:нет.
My best friend's name is Pete
he is a very good friend
we have known each other for many years
he has short blonde hair and light blue eyes
he has a nice and kind smile
his face is covered with freckles
he is a very busy person because he studies very hard at school
sometimes he helps me with some subjects if I don't understand them
he wakes up early and streches
then, he goes to school
after school, sometimes we do homework together
and then, he goes to his karate club
he really likes karate and I think it is a useful skill
karate is also good for the body and overall health
sometimes it can also be a self defence method
we love the same books and movies
he likes star wars, and so do I
he likes books about adventures like me
sometimes we recommend each other books
he is a good person, he never says anything rude about anyone
Pete is also very kind to older people, kids and animals!
I love spending time with Pete!
1+2+3+4+5+6+7+8+9+10+11+12=78 - сумма чисел на циферблате
78:6=13 - сумма цифр каждой части
13=1+12
13=2+11
13=3+10
13=4+9
13=5+8
13=6+7