126 high school students were asked if they speak Spanish, English or Cantonese. Their answers are summarized by the Venn diagra
m shown
How many students don't speak any of these languages?
How many students speak english?
How many speak Cantonese or Spanish?
How many students speak English and Cantonese?
How many students speak only one of these languages?
How many students speak Spanish and English, but not Cantonese?
How many students speak at least two of these languages?
How many students don't speak any of these languages?
How many students speak english?
How many speak Cantonese or Spanish?
How many students speak English and Cantonese?
How many students speak only one of these languages?
How many students speak Spanish and English, but not Cantonese?
How many students speak at least two of these languages?
1 answer:
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Answer:
The total resistance is
Step-by-step explanation:
Attached please find the circuit diagram. The circuit is composed by a voltage source and two resistors connected in parallel: and
.
First step: find the total current
For finding the current that the voltage source can provide, you must find the current consumed by each load and then add both. To do that, take first into account that the voltage is the same for both resistors ( and
).
The total current is:
Now, the total resistance () would be the voltage divided by the total current:
If you replace by the expression obtained previously, the total resistance would be:
After simplifying the terms you should get:
Now, you must replace the values of the resistors:
Thus, the total resistance is
