Find the value of x so that the function has the given value t(x)=3x;t(x)=24

Use the x-intercept method to find all real solutions of the equation.x^3-10x^2+27x-18=0

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?

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?