Devaughn is 6 years younger than Sydney. The sum of their ages is 46 . What is Sydney's age?

Why did the ice arena get so hot after the big game (this is math related google it to find the paper

Asystem of equations has 1 solution. if 4x-y=5 is one of the equations , which could be the other equation ?

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?