Use the marked parallel lines to find the value of y in the diagram below (1 point)
a. 19
b. 50
c. 55
d. 18

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?

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

What is the absolute value of -100000000000000?