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Aline on the wall and a line on the floor are skew. always, sometimes, or never?

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

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?