Posted by lee on Tuesday, April 2, 2013 at 11:31am.
Can anyone help explain how to work this problem out?
One factor in flood safety along a levee is the area that will absorb water should the levee break. the coordinates that make up the boundry area are (0,0),(2.8,2.1)and(4.3,4.4) what is the area of the land that would absorb the water?
I believe its
a=]x1,y1,1_x2,y2,1_x3,y3,1]
=0,0,1_2.8,2.1,1_4.3,4.4,1]
area=1/2[det a]
then Im stuck

algebra  Steve, Tuesday, April 2, 2013 at 11:45am
what, you can't find the determinant?
Those two zeros in the top row make it easy:
A = (2.8)(4.4)(4.3)(2.1) = 3.29
Better review your determinants if this technique is going to come up often.

algebra  lee, Tuesday, April 2, 2013 at 11:53am
Ok I see I was not multiplying the right numbers. Thanks for clarifying for me.

algebra  samantha, Monday, April 15, 2013 at 9:32pm
do you think you could help me with this quiz?
Answer This Question
Related Questions
 calc. 1  You are designing a poster with area 625cm^2 to contain a printing ...
 history  who built the levee's for the okeechobee lake?
 social studies  Scientists estimate that 600,000 acres of land will disappear ...
 Polar coordinates  I need some help on this Calculus question about polar ...
 Calculus  what is the definite integral of 1) Upper boundry 4 Lower boundry 0 ...
 language help !  DAD: Where’s the water now? MOM: As high as the car’s wheels. ...
 HELP PLEASE !!  DAD: Where’s the water now? MOM: As high as the car’s wheels. ...
 3rd grade math  Emma has 36 feet of fence. She wants to make the largest ...
 4th Grade Math  Re: Factor Numbers My son has to write at least two ways to ...
 4th Grade Math  Re: Factor Numbers My son has to write at least two ways to ...
More Related Questions