Mathew and Austin went fishing and caught three fish with a weight of 264 pounds altogether. The angelfish is four times the weight of the tuna. The marlin is six times the weight of the tuna. What is the weight of the tuna?

The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

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?