Which step is the same in the construction of parallel lines and the construction of a perpendicular line through a point on the line

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.

Which expression is equivalent to -12(3x-3/4)

Which of the following is the sum of 3 1/6 + 6 3/8?