Sunday, November 24, 2013

|2r - 1| = 1/4. The answer was 3/8 and 5/8. We could figure out the 5/8 but how do you get 3/8?

it means:
2r-1=1/4
or
2r-1=-1/4 which leads to
2r=-1/4+1
2r=3/4
r=3/8

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