Posted by Joe on Wednesday, May 13, 2009 at 3:07pm.
You are chosing between 2 health clubs. Club A offers a membership for $16 plus a monthly fee of $26. Club B offers a membership for $19 and a monthly fee of $25. How do i figure out when the costs will be equal and what each cost of the clubs are?

math  Reiny, Wednesday, May 13, 2009 at 3:19pm
cost A = 16 + 26n
cost B = 19 + 25n
solve 26n+16 = 25n+16
and put that back into one of the above equations,
it doesn't matter which one, you should get the same answer from either one of them

math  Joe, Wednesday, May 13, 2009 at 3:25pm
thanks i have 1 more question..a rectangular lot whose perimeter is 360ft is fenced along 3 sides. An expensive fencing along the lots length is $18 per foot. An inexpensive fencing along the two widths costs only $3 per foot.The total cost of the fencing is $2400, how do i find out the lots demensions.

math  Reiny, Wednesday, May 13, 2009 at 3:38pm
let the length be l
let the width be w
then 2w + 2l = 360
l = 180w
18l + 3(2w) = 2400
18(180w) + 6w = 2400
solve for w, put it back into l=3602w
(I got w = 70 , l = 110)
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