Monday

December 22, 2014

December 22, 2014

Posted by **11th grade** on Tuesday, March 27, 2012 at 10:10pm.

Solve by using quadratic formula.

- URGENT MATH please -
**Reiny**, Tuesday, March 27, 2012 at 10:29pmDid you make a sketch ?

Let the width of the cut done by Chris be x m

That leaves a rectangle of 40-2x by 30-2x to be cut by Jerri.

(40-2x)(30-2x) = (1/2)(40)(30)

4x^2 - 140x + 1200 = 600

x^2 - 35x + 150 = 0

(x-5)(x-30) = 0

x = 5 or x = 30 , but x = 30 makes no sense

x = 5

The strip should be 5 m wide.

**Answer this Question**

**Related Questions**

Math - chris cuts half a rectangular lawn, 40m by 30m, by mowing strips of equal...

math - Nala and her cousin agreed that they would each mow one-half of the lawn...

Math - Venski and his brother have each agreed to mow half of the front lawn, ...

math - i am really stuck on this application problem in my quadratic equations ...

basic geometry - A rectangle has width the same asa a side of a square whose ...

basic geometric - 10. a rectangle has width the same as a side of a square whose...

math - Sheila cuts a 60 foot wire cable in equal strips of 4/5 of a feet each. ...

math - Sheila cuts a 60 foot wire cable in equal strips of 4/5 of a feet each. ...

Math - Chris cuts a 3 1/2 feet long board of wood. He cuts out 4 pieces that ...

Math 12A - A rectangular building is to be built on a lot measuring 46m by 30m...