¡ALGUIEN QUE ME AYUDE POR FAVOR!

SOMEONE HELP ME PLEASE!

Ateacher has $80 to buy workbooks. each work book cost $3. if she buys as many workbooks as possible, how much money does she have leftover? a) $2 b) $4 c) $6 d) $8

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.

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab