Atheather has tickets at $6 for adults, $3.50 for students, and $2.50 for children under 12 years old. a total of 278 tickets were sold for one showing with a total revenue of $1300. if the number of adults tickets sold was 10 less then twice the bumber of students, how many of each type of ticket were sold for the showing?

What are the solutions to the equation 4x2+3x=24-x

Which number completes the inequality? 2/3 < _ < 7/9

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?