Answer:
2√21
Step-by-step explanation:
√81 is √4 times √21
Since √4 is a perfect square, √4 = 2
We are left with 2 times √21
2√21
Answer: 103/15
Step-by-step explanation:
We can simplify the right-hand side to be .
This means we need to solve:
The simplified form of the expression ( 6 1/5 - 3 3/4 ) as a mixed fraction .
<h3>What is the simplified form of the expression?</h3>
Given the data in the question;
6 1/5 - 3 3/4
First we convert the mixed fraction into an improper fraction.
6 1/5 = ( 6×5 + 1 )/5 = ( 30 + 1 )/5 = 31/5
3 3/4 = ( 3×4 + 3)/4 = ( 12 + 3 )/4 = 15/4
Hence;
31/5 - 15/4
We re-write both terms with common denominator.
( 31/5 × 4/4 ) - ( 15/4 × 5/5 )
124/20 - 75/20
Now, we can combine the denominators over common denominator.
( 124 - 75 )/20
( 124 - 75 )/20
49/20
Next we convert to a mixed fraction
We can get 20 from 49, 2 times with a remainder of 9
Hence
The simplified form of the expression ( 6 1/5 - 3 3/4 ) as a mixed fraction .
Learn more about fractions here: brainly.com/question/10708469
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To estimate the answer of 872*3 we know that 872 is only 28 away from 900 so we'll round 872 up to 900. Then we can take 900*3 which is 2,700. So we now know that 872*3 is roughly 2,700.
Hope this helps!=)
Answer:
4
Step-by-step explanation:
perimeter=4a
8/4=a
a=2
area=a square
=2*2
=4
hope so this will help you