Azoo measured the wingspan, in millimeters, of 9 butterflies.
55 50 54 57 50 55 53 52 55
what is the median length of the wingspans?
50 mm
54 mm
55 mm
57 mm

Combined megan and kelly worked 60 hours.kelly worked twice as many hours as megan.how many hours did they each worked?

Which value would be a solution for x in the inequality 47-4x< 7

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?