1. Solve the following system a) b) c) 2x - 1 = 5 2x+ y = 1 8x - 2y = 5 x + 4y = 7 3x + 4y = 14 -12x + 3y = 7 2. A milktea store in San Jose has daily fixed cost of $400. Each cup of milktea costs $3 to produce and is sold for $5. The beak-even point occurs where revenue is equal to cost. Find the break-even point. 3. A milktea store in Cupertino has daily fixed cost of $300. Each cup of milktea costs $2 to produce and is sold for $5. The beak-even point occurs where revenue is equal to cost. Find the break-even point. 4. In a chemistry class, a student is asked to mix 20% of solution A with water to makes 8 cups of 15% solution A. How many cups of solution A and how many cups of water do the student need to complete the required mixture? 5. A chemistry student is asked to mix a 10% of solution A to a 30% of solution B to create 10 litters of 15% solution mixture. How many litters of each solution does the student need? 6. In Napa Valley, a vintner fortifies wine that contains 10% alcohol by adding a 70% alcohol solution to it. The resulting mixture has an alcoholic strength of 16% and fills 1,000 one-liter bottles. How many liters of the wine and of the alcohol solution does the vintner use