Ellis's backyard has a 6.256.256, point, 25 by 6.25\,\text{m}6.25m6, point, 25, space, m patio. she would like to build a 1.5\,\text{m}1.5m1, point, 5, space, m wide extension around 333 sides of the patio, as the figure shows. she will buy 0.250.250, point, 25 by 0.25\,\text{m}0.25m0, point, 25, space, m tiles that come 252525 to a package.

how many packages does ellis need to buy to build the extension?

answer is:

1.75 pounds

c 1 hour

step-by-step explanation:

m = 2e

m = 2 so 2 = 2e

1 = e

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