Name_____________________________________________________		Date_____________________

Tech Math 1 - Unit5 - Objective4 Worksheet


Part One: Use substitution to solve the system of equations. 1)x-3y=-3 -2x+y=-4 2)2x-y=6 3x+y=4 3)2x-3y=3 x+4y=7 4)3x+4y=4 4x+10y=3 Part Two:Use addition or subtraction method to solve the system of equations. 1)x-3y=-3 -2x+y=-4 2)2x-y=6 3x+y=4 3)2x-3y=3 x+4y=7 4)3x+4y=4 4x+10y=3 Part Three: Solve using substitution or addition/subtraction method. 1) A chemist has two bottles of hydrochloric acid. One bottle is marked 40% HCL and the other is marked 50% HCL. How much of each solution should be mixed to produce 24ml of a solution that is 42% HCL. 2) A 10% saline solution and a 5% saline solution are to be mixed to produce 80ml of an 8% solution. How many ml of each should be used?

Unit 5 Outline