Ellis's backyard has a 6.25 by 6.25 m patio. She would like to build a 1.5m wide extension around 3 sides of the patio, as the figure shows. She will buy 0.25 by 0.25 m tiles that come 25 to a package.
How many packages does Ellis need to buy to build the extension?

1 3 5

step-by-step explanation:

i took the test: )

the answer would be 150 books

step-by-step explanation:

if you divide 300 by 2 you will get 150

answer: 5

step-by-step explanation:

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240