If a car travels at an average speed of x miles per hour, how far would the car travel in 90 minutes? a) 9x/2
b) 2x miles
c) 3x/2 miles
d) x/2 miles

Which is the graph of the piecewise function f(x)? f(x)=[tex]f(x) = \left \{ {{-x+1, x\leq 0 } \atop {x+1, x\ \textgreater \ 0}} \right.[/tex]

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?

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?