Question

To save material, Fred decides to build a horse corral using the barn for one side.He has 30m of fencing material and wants the corral to have an area of 100m^2. What are the dimensions of the corral.?
Just need help with coming up with an equation

Answer 1

the formula for the perimeter is P = 2l + 2w
The formula for the area , A = lw

so if the area needs to be 100 m^2 than

30m = 2l +2w

and

100 = l w

solve for l with the perimeter.

so l = 15m -w

substitute that back in the area formula.

100m^2 = (15 -w)(w)
100m = 15w -w^2

so now we have an equation

w^2 -15w +100 = 0

can you solve this?

Answer 2

ya just need to factor that out

Answer 3

Good, do it than...

Answer 4

14.11

Answer 5

Are you sure?

Answer 6

What did you do?

Answer 7

I used the quadratic formula