If f(x)={(3,,,7)} and g(x)=square root(x-3) what do i do to determine (f+g)(1)

Convert 2000 swiss francs to dutch guilders

Could someone with number 1 and 2

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.