# SOLUTION: Joe is selling tickets to the annual pancake breakfast. On the first day of tickets sales the school sold 3 senior citizen tickets and 5 child tickets for a total of $70. The schoo Algebra -> Algebra -> Matrices-and-determiminant -> SOLUTION: Joe is selling tickets to the annual pancake breakfast. On the first day of tickets sales the school sold 3 senior citizen tickets and 5 child tickets for a total of$70. The schoo      Log On

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 Algebra: Matrices, determinant, Cramer rule Solvers Lessons Answers archive Quiz In Depth

 Question 393288: Joe is selling tickets to the annual pancake breakfast. On the first day of tickets sales the school sold 3 senior citizen tickets and 5 child tickets for a total of $70. The school took in$216 on the second day by selling 12 senior citizen tickets and 12 child tickets. Find the price of a senior citizen ticket and the price of a child ticket. 3s+5c=70 12s+12c=216 That is as far as I got. I'm not sure where to go from there. Thank you in advance for your time and help.Answer by solver91311(16897)   (Show Source): You can put this solution on YOUR website! In the first place, your system of equations is exactly correct presuming tha that the variable represents the price of a senior citizen ticket and represents the price of a child ticket. You put this in the "Matrices/Determinant/Cramer's Rule" section, so I presume you want one of those methods. Here's Cramer's Rule using determinants: Find the determinant of the coefficient matrix: Then substitute the constants into the first column and again calculate Determinant: And substitute the constants into the second column and compute again. Finally, compute: John My calculator said it, I believe it, that settles it