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How many different ways can you make change for $.50 using only nickels,dimes, and quarters?

What is the distance between (–2 1/2,-3) and (1, –3)?

At the county fair, the baxter family bought 6 hot dogs and 4 juice drinks for $12.90. the farley family bought 3 hot dogs and 4 juice drinks for $8.55. find the price of a hot dog and the price of a juice drink.