1. 4 increased by the product of 5 and 3
2. the difference between 16 and the product of 4 and 2
3. the quotient of 25 and 5 increased by 3

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

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?