Предмет: Алгебра, автор: zhumanovaakbota


x - 7x + 8 = 0
х²-7х+8=0
пажалуста помогите пжпжпжпжжпжажпжпж​

Ответы

Автор ответа: yarsin666
0

Ответ:

-х^2+7х+8=0

х^2-7х-8=0

D=b^2-4ac=49+32=81

х1,2=-b+-√D/2a

х1,2=7+-9/2

х1=7+9/2=8

х2=7-9/2=-1

Объяснение:

zhumanovaakbota: не понял
Adelka666: посмотри мое решение, поймёшь
Автор ответа: Adelka666
0
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MONEY AS A MEDIUM OF EXCHANGE

Money is a medium of exchange in the economy. It is a means of payment for
goods and services and in settlement of debts. Money is also a standard of value for
measuring the relative economic worth of different goods and services. The price of
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acceptable to offer in exchange. In a money economy, the owner of a commodity can
sell it for money and buy anything he wants for his money. So money may be
regarded as a keystone of modern economic life.
The most important types of money are commodity money, credit money and fiat
money. The value of commodity money is about equal to the value of the material
contained in it. The principal materials used for this type of money have been gold,
silver, and copper. Credit money are documents with promises by the issuer to pay an
equivalent value in the standard money metal. Fiat money is paper money the value of
which is fixed by the government. Most minor coins in circulation are also fiat
money, because the value of the material of which they are made is usually less than
their value as money.
Both the fiat and credit forms of money are generally made acceptable through a
government decree that all creditors must take the money in settlement of debts. Fiat
money in the form of banknotes is referred to as a legal tender.
Banknotes are usually made from special high-quality paper, with watermarks,
metallic strips, and other features against forgery. Highly sophisticated printing
2
techniques are used and banknote designs have elements that are hard to copy. Fronts
and backs of notes are printed separately, and serial numbers are added later.
1. What is commodity money?
a) coins
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a) it would be easier to trade
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3. What is credit money?
a) banknotes
b) coins
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4. What is money usually made of?
a) silver
b) silver, copper, gold
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a) coins
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a) a standard of value
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a) Yes, always
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a) to make it impossible to forge money
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a) a store of wealth and medium of exchange
b) a store of wealth and standard of value
c) a medium of exchange and standard of value
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a) modern societies
b) primitive people
3
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