Does it make sense to use simple or compound interest for long term investing

What is an alternate exterior angle

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.

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left