как найти площадь треугольника,нужно умножить или прибавить?)

Решите уравнение x^log(3,x+1)=9

Исправте предложения:

-How long does he live here?

-Since September.

What are you going to do the next  summer.

Those student have discussed Text Three last Friday.

-Who have lunch at home?

-My grandparents do.

I think you are going to get a letter today.

There was not bus stop near our school.

The baby is not criing. The baby is sleeping.

These boys usually  play football five times the week.

When did they built the bridge?

I am thinking that they will like the film.

Helen cleans her teeth three times the day.

-Who are in the room?

-The children are.

Bob will at home at four o clock tomorrow.

These pupils have finished Unit Five last week.

When did they came home yesterday?

What is she going to do these evening?

How long do you live here? – Since 2002.

They are not running right now. They are playing football.

I think i am going to visit him next Friday.

I am thinking that the pupils will be in the library after classes.

помогите решить пожалуйста)

4х(квадрат)+4х+1=0

3х(квадрат)+8х-3=0

5х(квадрат)-8х-4=0

5х(квадрат)-8х+3=0

3х(квадрат)+2х-5=0

Пожалуйста помогите, очень срочно!!!

Нужно составить кроссворд по рассказу Лескова "Левша"