Arectangular patio is 20 meters by 30 meters and is surrounded by a sidewalk 2 meters wide. how many square meters are in the area of just the sidewalk

216 meters squared

Step-by-step explanation:

the sidewalk extends 2 m in all directions around which makes a 34 x 24 rectangle.  The area of that rectangle is 816 sq. m and the area of the patio is 600 sq. m.  Subtract the patio area from the entire area to get the difference of 216 sq. m for just the sidewalk.

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

it shoild be o

step-by-step explanation: