Arectangular garden is 80 m by 60 m. part of the garden is torn up to install a strip of lawn of equal width around the garden. the new area of the garden is 800 m squared. how wide is the strip of lawn?

Step-by-step explanation:

let x < 30 be the width of strip of lawn.

then (80-2x)(60-2x)=800

4800-160x-120x+4x²=800

4x²-280x+4000=0

x²-70 x+1000=0

x²-20x-50x+1000=0

x(x-20)-50(x-20)=0

(x-20)(x-50)=0

x=20,50

x=50(rejected)

x=20 m

6.9

step-by-step explanation:

simple math really

6 1/2 times 0.6 = 3.9

but if you are just doing 6 and not 6 1/2 then the answer is 3.6

step-by-step explanation:

try remembering the steps