Writing & solving equations from word problems

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Presentation transcript:

Writing & solving equations from word problems Algebra 1 September 10 & 11, 2012

4-step process Identify your variable. Write your equation. Solve your equation. Answer the question with a sentence.

Class example #1 Your school has a $1200 grant to buy books and magazine subscriptions for the school library. The average cost of a magazine subscription is $30. Your school decides to spend $870 on books and the remaining amount on magazine subscriptions. How many magazine subscriptions can the school buy?

class example #2 You are driving to a vacation spot that is 1500 miles away. Including rest stops, it takes you 42 hours to get to the vacation spot. You estimate that you drove at an average speed of 50 miles per hour. How many hours were you not driving?

your turn… You helped a friend move a short distance recently. The friend rented a truck for $15 an hour and rented a dolly (two-wheeled cart) for $5. Your friend paid a total of $80 for the rental. For how long did your friend rent the truck?

try another… The membership fee for joining a gardening association is $24 per year. A local botanical garden charges members of the gardening association $3 for admission to the garden. Nonmembers of the association are charged $6. After how many visits to the garden is the total cost for members, including the membership fee, the same as the total cost for nonmembers?