Friday

August 29, 2014

August 29, 2014

Posted by **YKWCH** on Tuesday, December 4, 2012 at 11:43am.

- Pre-Calc -
**Steve**, Tuesday, December 4, 2012 at 11:50am270 = x(14-2x)(20-2x)

4x^3 - 68x^2 + 280x - 270 = 0

x = 1.4 or 4.2

not sure what tools you have to solve cubics. In this case a simple graphic method gives approximate results.

visit wolframalpha.com and type in

solve x(14-2x)(20-2x) = 270

**Related Questions**

Math - An open box is to be made from a 10-ft by 14-ft rectangular piece of ...

math - open top rectangular box made from 35 x 35 inch piece of sheet metal by ...

Calculus - A square sheet of cardboard with a side 16 inches is used to make an ...

PRE-CALCULUS - AN OPEN BOX IS FORMED BY CUTTING SQUARES OUT OF A PIECE OF ...

Pre Calc - an open box is to be formed by cutting squares from a square sheet of...

Pre-Calc - An open box is formed by cutting squares out of a piece of cardboard ...

Calculus - A SHEET OF CARDBOARD 180 INCHES SQUARE IS USED to make an open box by...

calculus - an open box is to be made from a piece of metal 16 by 30 inches by ...

math - a rectangular sheet of cardboard 4m by 2m is used to make an open box by ...

Calc - You want to make a rectangular box, open at the top, by cutting the same ...