Figure WXYZ is rotated 90° clockwise around the origin to form figure W'X'Y'Z'.
1 answer:
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Method 1:
Look at the picture.
is greater than
Method 2:
Find the common denominator:
multiples of 7: 0, 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, ...
multiples of 9: 0, 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, ...
63 = 7 · 9
therefore
She made her mistake at the first step. To simplify a radical, you would find two numbers that multiply by each other to get your original number (under the radical) and have one of the number be a perfect square.
Her reasoning is wrong because 10*10 is not
. Had she been correct, her answer should have been able to be squared to equal
In other words, she should have done
(We used 25 because 25 is a perfect square, 5*5=25).
:)
Her reasoning is wrong because 10*10 is not
In other words, she should have done
(We used 25 because 25 is a perfect square, 5*5=25).
:)