Please help me I’m being timed

What is the probability of drawing three queens from a standard deck of cards, given that the first card drawn was a queen? assume that the cards are not replaced.

Create and solve a linear equation that represents the model, where squares and triangles are shown evenly balanced on a balance beam. assume the weight of a square is 1 unit and the weight of a triangle is unknown.

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?