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

2500

step-by-step explanation:

replace   with   27   and simplify.

10 , 27 , 10 , 70 , 10 , 35 , 10 , 48

step-by-step explanation: