What is m< 1 ? how would u find it?

Which expression is equivalent to 5r6141 2r+st6

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

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.