помогите, что больше 5/17 или 12/17 42% или 43/78 8/9 или 9/8

There are 10 questions in this quiz. Choose the correct answer.

1. We study past events in ___ .

a) sociology

b) history

c) mathematics

2. The opposite of loose is ___ .

a) find

b) baggy

c) tight

3. Her apartment is on the ___ floor.

a) thirteenth

b) thirteen

c) three

4. Who is your favorite ___ ?

a) singer

b)song

c) show

5. It's the ___ time he has lost his phone.

a) two

b) twice

c) second

6. What did you ___ for breakfast?

a) have

b) go

c) leave

7. She's about 50. She's ___ .

a) middle-ages

b) middle aged

c) medium-aged

8. There were four ___ in the car.

a) persons

b) peoples

c) people

9. Try to get home before rush ___ .

a) hour

b) time

c) traffic

10. There is often a traffic ___ at rush hour.

a) congestion

b) queue

c) jam

Разложите на множители :

5m^2-10mn+5n^2

[tex]5m^{2}-10mn+5n^{2}[/tex]

Найдите разность арифметической прогрессии, если сумма первых ста её членов на пятьдесят больше, чем сумма следующих за ними ста членов этой же прогрессии.

Помогите написать сочинение "Мое открытие".