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In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

On a piece of paper graph f(x)=5•(0.4)^x