If h(x) = x-7 and g(x) = x2, which expression is equivalent to (9.5)(5)? O (5-7)2
(5)2 - 7
(5)?(5-7)
O (5-7)x2

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?

Find two numbers if their sum is 91 and the ratio is 6: 7?

Asource of laser light sends rays ab and ac toward two opposite walls of a hall. the light rays strike the walls at points b and c, as shown below: what is the distance between the walls?