Площадь треугольника ABC равна 36 см в квадрате, а AC= 3 см. Если угол D=углу A и площадь треугольника DBF 16 см квадрате , то отрезок DF чему равен? 

Два одинаковых точечных заряда находятся на расстоянии 60см. Их заряды равны 4*10(в -7 степени)Кл и 0,8*10(в -7 степени)Кл. Шарики приводят в соприкосновение, а затем удаляют на прежднее расстояние. Определить силу взаимодействия после соприкосновения.

РЕШИТЕ УРАВНЕНИЕ 94-5b=64

1.Could you cross _________ the wrong forms in these sentences? 

up
on
out

2. There were very ________ people in the restaurant, so we found a table easily. 

few
a few
many

3. Harry has got ________ friends. 

a lot of
much
any

4. Match the food to the country. 

chicken curry

1    Spain

sushi

2    Mexico

chop suey and rice

3    India

roast beef

4    Italy

paella

5    England

buritto

6    Germany

spaghetti

7    China

frankfurter sausage

8    Japan

5. We make patterns with lines and shapes. Match. 

striped/stripy/stripey

1    square of different colours

spotted/spotty/polka dot

2    circles of colours

flowery/floral

3    flowers shapes

tartan

4    parallel lines

checked

5    lines crossing other lines

6.Match 

A ) a kilo of

1    a carton of sugar

B ) a piece of

2    cocoa

C ) a bottle of

3    a glass of water

D ) a can of

4    honey

E ) a bottle of

5   a bottle of milk

F ) a slice of

6    a can of coke

G ) a loaf of

7    yoghurt

H ) a carton of

8    cake

I ) a glass of

9    a slice of cheese

J ) a cup of

10    a loaf of  bread  

7. The keys must be ___________ here - I put them on this table yesterday. 

nowhere
anywhere
somewhere

8. Did they _________ swimming in summer? 

went
go
goed

9. _________ you like an apple pie with vanilla ice cream? 

Would
Will
Can

10. _________ in this school for five years. 

am
was
have been

11. Yesterday Monica _________ at home all day. 

did be
were
was

12. Music and musicians. Match. 

A dance

1    Beethoven

An opera singer

2    The Barber of Seville

A musical instrument

3    Mick Jagger

An opera

4    Trumpet

A ballet

5    Kylie Minogue

A love song

6    Coldplay

A classical composer

7    Placido Domingo

A pop group

8    Tango

A pop singer (female)

9    Swan Lake

A rock star (male)

10    Chasing Cars

13.Which cities are NOT capital cities? 

New York
Frankfurt
Milan
Lisbon
Sydney
Paris

14._______ you going to buy Tom a present? 

Are
Can
Will

15.Could you speak a little________ ? 

loud
loudly
louder

16.Yesterday they cut ________ the gas in our flat. 

out
in
off

17.I must find _______which platform the train leaves from. 

out
on
in
18.Match 

A) penguin, eagle

1    mammals

B)gorilla, lion

2    fish

C)piranha, eel

3    reptilies

D) fly, ladybird

4    bird

E) snake, lizard

5    insects

найти площадь фигуры,ограниченной линиями y=x^2+2 y=x+2