Ellis's backyard has a
6.25
6.256, point, 25 by
6.25

m
6.25m6, point, 25, start text, m, end text patio. She would like to build a
1.5

m
1.5m1, point, 5, start text, m, end text wide extension around
3
33 sides of the patio, as the figure shows. She will buy
0.25
0.250, point, 25 by
0.25

m
0.25m0, point, 25, start text, m, end text tiles that come
25
2525 to a package.

extension patio
How many packages does Ellis need to buy to build the extension?

1. are the triangles similar and if so why? what is the value of x? show your work.

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?