(1). Sue is starting a lawn-cutting business. Her start-up cost to buy two lawn mowers and an edge trimmer is $665. She has figured out that she will use about $1 in gas for each lawn. If she charges $20 per lawn, what will her break-even point be? (3 Marks)

(2a) Why might you solve this system of equations by adding or subtracting? (2 Marks)

2x + 3y = 4

2x - 3y = 8

b) Can you create a system of linear equations that you might solve by adding. (2 Marks)

c) Can you create a system of linear equations that you might solve by subtracting. (2 Marks)

(3). Rolf needs 500 g of chocolate that is 86% cocoa for a truffle recipe. He has one kind of chocolate that is 99% cocoa and another kind that is 70% cocoa. How much of each kind of chocolate does he need to make the 86% cocoa blend? Round your answer to the nearest gram. (3 Marks)