单选题In a wallet containing nickels and dimes, the ratio of nickels to dimes is 2：5. If there are 42 coins in all, what is the value of the dimes?A$1. 20B$3. 00C$1. 50D75€E30€
单选题
In a wallet containing nickels and dimes, the ratio of nickels to dimes is 2：5. If there are 42 coins in all, what is the value of the dimes?
A
$1. 20
B
$3. 00
C
$1. 50
D
75€
E
30€
参考解析
解析：
Let 2x the number of nickels and 5x the number of dimes, then 2x+5x=42, so x=6. There are 30 dimes, worth $3.00.
Let 2x the number of nickels and 5x the number of dimes, then 2x+5x=42, so x=6. There are 30 dimes, worth $3.00.
相关考题：
Current ratio and quick ratio are two of the most common ratios used to analyze a firm’s short－term or liquidity position.() 此题为判断题(对，错)。
If a firm has a quick ratio of 1, the subsequent payment of an account payable will cause the ratio to increase.() 此题为判断题(对，错)。
my wallet and my taste for gorgeous ______ gadgets, but not my thought. A、smoothB、gracefulC、sleekD、stealthy
He dropped the pennies _______ the two dimes I had hidden in my hand. A.out withB.inC.in withD.with
You opened the encryption wallet and then issued the following command:Then you closed the wallet. Later, you issued the following command to create the EMPLOYEES table in the SECURESPACE tablespace and you use the NO SALT option for the EMPID column.What is the outcome?（）A. It creates the table and encrypts the data in it.B. It generates an error because the wallet is closed.C. It creates the table but does not encrypt the data in it.D. It generates an error because the NO SALT option cannot be used with the ENCRYPT option.
You created an encrypted tablespace:You then closed the encryption wallet because you were advised that this is secure.Later in the day, you attempt to create the EMPLOYEES table in the SECURESPACE tablespace with the SALT option on the EMPLOYEE column.Which is true about the result?（）A. It creates the table successfully but does not encrypt any inserted data in the EMPNAME column because the wallet must be opened to encrypt columns with SALT.B. It generates an error when creating the table because the wallet is closed.C. It creates the table successfully, and encrypts any inserted data in the EMPNAME column because the wallet needs to be open only for tablespace creation.D. It generates error when creating the table, because the salt option cannot be used with encrypted tablespaces.
An（ ），serving a function similar to a physical wallet, holds credit card numbers,electroruc cash, owner identification, and owner contact information and provides that information at an electronic commerce sites checkout counter.A. electronic wallet B. electronic commerceC. third party payment D. Internet banking
About electronic wallet, the correct descoiption is (72).A.electronic wallets require consumers to enter their information at every site with which they want to do businessB.a client-side electronic wallet stores a customer's information on a remote server belonging to a particular merchant or wallet publisherC.a server-side electronic wallet s ores consumers' information on their computerD.when consumers select items o purchase, they can then click their electronic wallet to order the items quick,
What does the woman want the man to do?A. Buy the tickets. B. Buy her a wallet. C. Go back for her wallet
About electronic wallet，the correct description is ______.A.electronic wallets require consumers to enter their information at every site with which they want to do businessB.a client-side electronic wallet stores a customer's information on a remote server belonging to a particular merchant or wallet publisherC.a server-side electronic wallet stores consumers' information on their computerD.when consumers select items to purchase, they can then click their electronic wallet to order the items quickly
Which of these terms refers to call issues that cause variations in timing or time of arrival？（）A、queuingB、jitterC、packet lossD、digitized samplingE、signal-to-noise ratio ratio
Which of the following is the definition of CAS latency？（）A、 CAS latency is the ratio between the column access time and the clock cycle time.B、 CAS latency is the ratio between the row access time and the clock cycle time.C、 CAS latency is the ratio between the column access time and the data burst transfer time.D、 CAS latency is the ratio between the row access time and the data burst transfer time.
The IBM Tivoli Access Manager for Enterprise Single Sign-On IMS is configured to cache user’s wallets. The SLA for network reliability between the IMS Server and the desktop machines is 95%. The customer wants to use Graphical Identification and Authentication （GINA） replacement， and has enabled Active Directory （AD） password synchronization. The user has a cached wallet on their private desktop. Which statement is true when the network is unavailable？（）A、The user would not be able to log in to the wallet.B、The user is able to log in with their wallet password， but the wallet is not synchronized with the server.C、A user must be re-assigned to another policy template in order to change any aspects of the applied policy.D、The user experiences normal operation， but AccessAgent will be unable to store newly captured passwords.
Examine the following RMAN command： RMAN CONFIGURE ENCRYPTION FOR DATABASE ON； RMAN BACKUP DATABASE PLUS ARCHIVELOG； Which prerequisite must be met before accomplishing the backup？（）A、 Provide a password for the encryptionB、 Set up an Oracle wallet for the encryptionC、 No setup is required as it is a default encryption methodD、 Both Oracle wallet and password must be set up for the encryption
问答题If there are only red, blue, and green marbles in a jar, what is the ratio of red to blue marbles? (1) The ratio of red to green marbles is 2:3. (2) The ratio of green to blue marbles is 6:5.
问答题A jar contains 30 coins, of which 20 are nickels and 10 are dimes. If 7 coins are removed, how many nickels are left? (1) More nickels are removed than dimes. (2) The remaining coins in the jar are worth $1.55.
单选题In a wallet containing nickels and dimes, the ratio of nickels to dimes is 2：5. If there are 42 coins in all, what is the value of the dimes?A$1. 20B$3. 00C$1. 50D75€E30€
单选题If the compression ratio is increased on any diesel engine, （）Athe expansion ratio will decreaseBcombustion will be slowed downCthermal efficiency will decreaseDthermal efficiency will increase
单选题Which of the following is the definition of CAS latency？（）A CAS latency is the ratio between the column access time and the clock cycle time.B CAS latency is the ratio between the row access time and the clock cycle time.C CAS latency is the ratio between the column access time and the data burst transfer time.D CAS latency is the ratio between the row access time and the data burst transfer time.
单选题For a given fuel, a change in the compression ratio will affect the ignition lag by which of the listed means?（）AAn increase in compression ratio will increase the ignition lagBAn increase in compression ratio will decrease the ignition lagCA decrease in compression ratio will decrease the ignition lagDA decrease in ignition lag will increase the compression ratio
单选题The ratio of the height of a vessel’s rudder to its width is referred to as the（）.Aaspect ratioBconstriction ratioCrudder ratioDsteering ratio
单选题In a class of 160 seniors, the ratio of boys to girls is 3 to 5. In the junior class, the ratio of boys to girls is 3 to 2. When the two classes are combined, the ratio of boys to girls is 1 to 1. How many students are in the junior class?A400B360C200D180E160
单选题The ratio of r to s is 3 to 4. The ratio of s to t is 2 to 9. What is the ratio of r to t?A1 to 3B1 to 6C2 to 9D3to10E4 to 5
填空题The ratio of a to b is the same as the ratio of 1.4 to 7. If a＝14, what is the value of b?____
单选题Phil has x quarters, y dimes, and z nickels and nothing else. Which of the following expressions represents the amount of money that Phil has, in dollars?A0.25x + 0.10y + 0.05zB2.5x + 1. 0y + 0.5zC25x + 10y + 5zD0.25x + 0.10y + 0.5zE25x + 10y + 50z