Alice has a total of 12 dimes and nickels. She has 2 more nickels than dimes. Which equation represents the given problem situat
2 answers:
Answer: The correct option is
(A) where c is the number of dimes.
Step-by-step explanation: Given that Alice has a total of 12 dimes and nickels and she has 2 more nickels than dimes.
We are to select the correct equation that represents the given problem situation.
Let c represents the number of dimes. Then, the number of nickels will be (c + 2).
Since there are total 12 coins, so the required equation is given by
Thus, the required equation is
where c is the number of dimes.
Option (A) is CORRECT.
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Answer:
2/7 or 0.2857
Step-by-step explanation:
The expected time before the first bulb burns out (two bulbs working) is given by the inverse of the probability that a bulb will go out each day:
The expected time before the second bulb burns out (one bulb working), after the first bulb goes out, is given by the inverse of the probability that the second bulb will go out each day:
Therefore, the long-run fraction of time that there is exactly one bulb working is:
There is exactly one bulb working 2/7 or 0.2857 of the time.