How many four-letter words can be made from the english alphabet – without reusing any letters?

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

For the chance to be team captain, the numbers 1-30 are put in a hat and you get two chances to pick a number, without replacement. which formula correctly shows how to find the probability that you choose the number 1 and then 2?