Simplify 7.5 + n + 9.63. 7.5n + 9.63 17.13n n + 17.13

What is the difference between regular convex and concave polygons

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?

If two lines form congruent alternate interior angles with a transversal, then the lines