What is the percent of decrease from 600 to 90 ??

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.

Simplify. 3(4+4x) (type your answer in with no spaces)

Ys is the perpendicular bisector of xz what it is the length of xs