Which one of the following is not closed under the operation being performed
1 answer:
Remember that polynomials are closed under addition, subtraction, and multiplication, but they are not closed under division. The only division you have there is B; therefore the correct answer is B.
A.
. The result is still a polynomial; therefore, answer A is incorrect.
B.
with a remainder of 26. The result is not a polynomial anymore; therefore, B is the correct answer.
C.
. The result is still a polynomial; therefore, answer C is incorrect.
D.. The result is still a polynomial; therefore, answer D is incorrect.
A.
B.
C.
D.
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Answer:
The Distance cover by boat in 2 hours and 15 minutes is 72 km
Step-by-step explanation:
Given as :
The Distance cover by boat = 128 kilometer
The time taken is 4 hours
As , Distance = Speed ×Time
So , Speed =
Or, Speed =
∴ Speed = 32 km per hour
Now, again The boat travel 2 hours and 15 minutes further with speed 32 kmph
So, Time2 = 2 +
Or, Time2 = 2 +
I.e Time2 = hours
Again , Distance = Speed ×Time
So , Distance = 32kmph × hours
I.e Distance = = 72 kilometer
Hence The Distance cover by boat in 2 hours and 15 minutes is 72 km Answer
