Get out your Homework from the weekend: Graphing Systems of Linear Inequalities This is page 20 in your notebook.

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Presentation transcript:

Get out your Homework from the weekend: Graphing Systems of Linear Inequalities This is page 20 in your notebook.

Wrapping Up Unit 2 Task This will be page 21 in your notebook.

1. You and your family are planning to rent a van for a 1 day trip to Family Fun Amusement Park in Friendly Town. For the van your family wants, the Wheels and Deals Car Rental Agency charges $25 per day plus 50 cents per mile to rent the van. The Cars R Us Rental Agency charges $40 per day plus 25 cents per mile to rent the same type van. a. Write a mathematical model (equation) to represent the cost of renting a van from the Wheels and Deals Agency for 1 day. i. Do the units matter for this equation? ii. Use the equation to determine the cost for renting the van from this agency for 1 day and driving 40 miles. b. Write a mathematical model (equation) to represent the cost of renting from the Cars R Us Agency for 1 day. i. Do the units for this equation match the units for the equation in part a? Does this matter when comparing the two equations? ii. Use the equation to determine the cost of renting the van from Cars R Us for 1 day and driving 40 miles.

c. Graph the two models (equations) on the same coordinate system. Be sure to extend the lines until they intersect. *Think about which variable is the dependent variable and which is the independent variable.

d. Where do the two lines intersect? e. What does the point of intersection mean? f. When is it cheaper to rent from Wheels and Deals? g. When is it cheaper to rent from Cars R Us? h. Friendly town is approximately 80 miles from your hometown. Which agency should you choose? Justify your answer.

2. When you leave the car rental agency, the gas tank is near empty so you go to the Fill ‘er Up Convenience Store for gas. Gas at this station is $3.49 per gallon. You spend $78 on gas. Approximately how many gallons of gas were purchased? 3. While at the gas station, you go into the store to buy drinks for the six people in your van. Part of your family wants coffee and the rest want a soda. Coffee in the store costs $0.49 per cup and sodas are $1.29 each. The cost of the drinks before tax was $6.14. a. Write a mathematical model (equation) that represents the total number of drinks purchased using c for cups of coffee and s for cans of soda. b. Write another mathematical model (equation) that represents the total cost of the coffee and soda. c. Solve the system of equations. *Use substitution.