1. For 5x - 2y = 4, find y given x = 2. 2. For X V " find x given y = 2 and z = 5. Show your work. 3. How many liters of a 10% acid solution must be mixed with 5 liters of a 25% acid solution to give a 15% solution? 4. Find the x- and y-intercepts of r + 3y + 2 -0 and use these intercepts to graph the equation. 5. Find the slope of the line that contains the points (8, -6) and (-7, 2). Show your work. 6. The price of a 2-hour plumbing repair job is $140 and the price of a 5-hour job is $290. Use the slope to predict the cost of a repair job lasting 3 hours. Show your work. 7. The Partrick County 4-H club has $500 to spend on trees for the club's orchard. The club votes to plant both apple trees and pear trees. If pear trees cost $40 cach and apple trees cost $25 each, write an equation in standard form that models the situation. Use x for the number of apple trees and y for the number of pear trees and ignore sales tax