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 = 180-w

18l + 3(2w) = 2400

18(180-w) + 6w = 2400

solve for w, put it back into l=360-2w

(I got w = 70 , l = 110)

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