Предмет: Алгебра, автор: vlaik2358

Помогите решить пожалуйста 5,6. С объяснением.

Приложения:

Ответы

Автор ответа: manyny06
1

Ответ:

решение смотри на фотографии

Приложения:
Автор ответа: Itakeyourquenn
0

Ответ:

№5.

3.6

№6

-4⅘

Объяснение:

√3 и √75 мы сокращаем. \frac{6 \sqrt{27} }{ \sqrt{75} }  =   \frac{6 \times 3 \sqrt{3} }{ \sqrt{75} } =  \frac{6 \times 3}{ \sqrt{25} }  =  \frac{18}{5}   = 3 \frac{3}{5}  = 3.6

 \frac{x}{6}  + 2 \frac{3}{4} x + 14 = 0 \\  \frac{x}{6}  +  \frac{2 \times 4 + 3}{4} x + 14 = 0 \\  \frac{x}{6}  +  \frac{11}{4} x + 14 = 0 \\  \frac{12x}{6}  +  \frac{12 \times 11}{4} x + 14 \times 12 = 0 \times 12 \\ 2x + 33x + 168 = 0 \\ 35x =  - 168 \\ x =  \frac{ - 168}{35}  \\ x = -   \frac{24}{5}  \\ x =  - 4 \frac{4}{5}

Домножаем на 12 все части уравнения, всё сокращаем и решаем.

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Task 1
Read the text below and choose the correct word for each space.For each question.
1-10 , mark the correct letter A, B,C or D.
Chocolate
When the Spanish explorer Cortez 0-A- Mexico in the sixteenth century , he found the people there using a drink they __1__ chocolate.It tasted quite strong __2__ it had pepper in it.To __ 3__ it taste better , the Spanish added sugar to it.When chocolate first came to Europe in the seventeenth century , people started to drink it with milk , __4__ of water.Nowadays , tonnes of chocolate and cacao are __5__ to factories , where they are turned __6__ many popular sweets and cakes.
__7__ chocolate and cacao come from the fruit of cacao tree.Cacao trees __8__ only be grown in hot countries , as they need a warm climate.Cacao is an American plant , __9__ still grows wild in the northern part of South America.Countries in Central and South America were the first to grow it , but today Africa __10__ the world with the most of chocolate.
Choose one letter A,B,C or D
Example 0 A.reached , B.arrived , C.got , D.went.
1. A.announced , B.told , C.called , D.declared.
2. A.while , B.because , C.so , D.whether.
3. A.let , B.cause , C.allow , D.make.
4.A.apart , B.except , C.rather . D.instead.
5. A.delivered , B.directed , C.prepared , D.produced.
6. A.down , B.into , C.off , D.over.
7. A.Both , B.Every , C.Either , D.Each.
8. A.ought , B.can . C.have , D.might.
9. A.what , B.which , C.who , D.whose.
10. A.brings , B.fetches , C.supplies , D.gives.