1. Algebra 1 Ch.7 Notes Page 61 P61 7-4 Applications of Linear Systems

2. Methods for Solving Systems of Linear Equations Graphing Substitution Elimination Word Problems

3. n = notebook p = pen A student buys 7 notebooks and 8 pens for $5.44. He returns later to buy 5 notebooks and 12 pens for $4.64. What is the cost of each notebook and each pen? Example

4. Break-Even Points

5. Finding a Break Even Point A model airplane club publishes a newsletter. Expenses are $.90 for printing and mailing each copy, plus $600 total for reasearch and writing. The price of the newsletter is $1.50 per copy. How many copies of the newsletter must the club sell to break even? y = dollars of expenses or income x = number of copies

6. Ratios The ratio of boys to girls at a certain college is 4:5. How many boys and girls are there if the total number of students is 3,321? b = boys g = girls