(x^2-9)/(x+1) ÷ (x^2-6x+9)/(7x+7) reduced form?

a) 7(x-3)^2 b) 7(x+3) c) 7(x-3) d) 7(x+3)^2

x+3 x-3 x+3 x-3

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.