Jason drives 15 miles in 10 minutes. If he drove one hour in total at the same rate how far did he go

What is the approximate total length of iron edging needed to create the square frame and the two diagonals?

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

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?