advertisement

Algebra 1 7.2 Day 2 Homework Name: ________________________________ Date: __________________ Period: ______ REVIEW: SOLVING SYSTEMS 1)If you are solving the linear system shown using the substitution method, which variable would you solve for in which equation? (Circle the best variable to solve for) 2) Solve the following system of equations by graphing -5x + 3y = 3 4x + 3y = 30 5x + 7y = 3 6x - 3y = 24 Explain why you picked that variable: SOLVING SYSTEMS USING SUBSTITUTION: (Hint – remember to clear out decimals!) 3) 2x = 12 4) 35x + y = 20 x – 5y = - 29 1.5x – 0.1 y = 18 5) 0.02x + .1y = - .18 5.5x + 1.8y = 27.6 6) x+y=0 x – 2y = 6 List the Solution to the following systems of equations by looking at the graph: 7) 8) 9) Solution: ________________________ Solution: ________________________ Solution: ________________________ 10) Solve the following by setting up a system of equations and then using Substitution: Laura has a total of 27 coins consisting of quarters (x) and dimes (y). Altogether they add to $4.50. How many of each type of coin does she have?