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September 17, 2014

September 17, 2014

Posted by **Pinky P** on Tuesday, January 3, 2012 at 10:06pm.

variation constant is K=

equation of variation is y=

2.Jack usually mows his lawn in 6 hours. Marilyn can mow the same yard in 4 hours. How muschtime would it take for them to mow the lawn together

- algebra -
**Steve**, Wednesday, January 4, 2012 at 10:47amsince y = kx, k= 42/6 = 7

------------------------

1/t = 1/6 + 1/4 = 5/12

so,

t = 12/5

makes sense, since if they each took 6 hours, they could do it together in 3. If the each took 4 hours, they could do it together in 2.

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