3.2 Substitution & Elimination

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Presentation transcript:

3.2 Substitution & Elimination Learning goals solve systems of equations algebraically

Ex 1 Solve using Substitution

Ex 2 Solve using Substitution

Ex 3 Solve using Substitution

Ex 4 Solve using Elimination

Ex 5 Solve using Elimination

Ex 6 Solve using Elimination

Ex 7 An online music company offers 15 downloads for $19.75 and 40 downloads for $43.50. Each price includes the same one-time registration fee. What is the cost of each download and the registration fee?

Ex 8 A student has some $1 bills and $5 bills in his wallet. He has a total of 15 bills that are worth $47. How many of each type of bill does he have?

Ex 9 A youth group with 26 members is going skiing. Each of the five chaperones will drive a van or a car. The vans can seat seven people and the cars can seat five people. Assuming there are no empty seats, how many of each type of vehicle could transport all 31 people to the ski area in one trip?

Ex 10 A fishing boat travels 10 miles down stream in 30 minutes. The return trip takes the boat 40 minutes. Find the rate of the boat in still water..