Can someone Please help me show my work for this its due in 5 minutes IT HAS TO DUE WITH LINEAR EQUATIONS.​

What is the missing constant term in the perfect square that starts with x^2 -20x

Determine the number of outcomes in the event. decide whether the event is a simple event or not. upper a computer is used to select randomly a number between 1 and 9 comma inclusive. event upper b is selecting a number greater than 4. event upper b has nothing outcome(s). is the event a simple event? (yes or no) because event upper b has (fewer than, exactly, more than) one outcome.

Find the amount of simple interest earned for depositing the given principle in an account if $2200 is invested at 5.5 % for 6 months