Complete the square for the expression, then factor the trinomial. x^2-4x

please explain how to do it as well! :)

At school there are 526 students and 263 are girls about how likely is it that a randomly chosen student will be a boy

What is the value of x in the equation 1.5x+4-3=4.5(x-2)?

Need this at the city museum, child admission is 6 and adult admission is 9.20. on tuesday, 132 tickets were sold for a total sales of 961.60. how many adult tickets were sold that day?