Shop A sells a pair of shoes at $80.50 before a 20% discount. Without using a calculator, use estimation to decide which shop to buy the shoes from. Show your working clearly.​

50 plz, given the system of equations, match the following items. x + 3 y = 5 x - 3 y = -1 a) x-determinant b) y-determinant c) system determinant match the following to the pictures below.