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Systems of Equations Graphing Substitution Elimination
Systems of Equations
Graphing SubstitutionElimination
ModelO Emily is moving to a new apartment and
wants to rent a 10-foot truck. She calls both U-Haul and Bob’s truck rental to compare prices. U-Haul is $19.95 per day and $0.79 per mile. Bob’s is $24.95 per day and $0.75 per mile.
a) Write equations for two companies total rental quotes for one day.
b) Graph on same coordinate planec) Determine the distance when both
companies will cost the same.
PracticeO A company wants to print flyers for
advertising a new product. There are two options to produce the flyers.
O Traditional printing cost is $250 for setup and $0.15 per page printed
O Digital Printing charge $50 for setup and $0.20 per page printed.
a) Determine the equationsb) Graph on the same coordinate planec) Determine when both printing options will
cost the same.
SketchO Given two equations sketch the lines
on the same coordinate plane.
Sketch:
ApplicationO a) Write a
model for geothermal energy
O b) Write a model for wind energy
O c) Determine when both are the same.
Year Geothermal
Wind
2003 5.37 1.79
2004 5.43 2.24
2005 5.28 2.8
2007 5.12 4.69
Graphing Calculator
After putting into stat plot determine the solution.
Types of Systems
Inconsistent
Consistent
Determine the type of system
Algebraic MethodO Solving systems by substitution.
Determine the solution by substitution
ApplicationO Using the model from Chapter 2.1 for
geothermal and wind energy, find the year when the amount of geothermal and wind energy produced will be the same.
Where G(t) is the percentage of renewable energy produced by using geothermal energy t years since 2000 and W(t) is the percentage of renewable energy produced by using wind energy t years since 2000.
a) Find the equationsb) Find when the sales will result in the same monthly salary for both options.
O As a new sales employee, you are given two salary structures to choose from. The first option has a base salary of $1200 per month and 7% commission on sales made. The second option has a base salary of $800 per month and 9% on sales commission made.
EliminationO Solving systems by canceling one of
the variables.
Solve
Mixing SolutionsO Yolanda needs 70ml of 45% saline
sln for a science experiment. She has some 60% saline sln and some 20% saline sln. How much of each of these slns should Yolanda combine to get the 70ml of 45% saline sln she needs?
