Graph the image of QRS after a reflection over the line y=x

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Arestaurant needs to buy thirty-seven new plates. if each box has five plates in it, how many boxes will they need to buy?

If g(x) is an odd function, which function must be an even function?

Asource of laser light sends rays ab and ac toward two opposite walls of a hall. the light rays strike the walls at points b and c, as shown below: what is the distance between the walls?