Section 8.1
Quiz 8.3
Question: Solve the following system of linear equations. Enter your solution like x=-7, y=8. If there are infinitely many solutions, enter redundant. If there is no solution, enter no solution.
6x+8y = 38
10x+15y = 70

 
     

Section 8.1
Quiz 8.4
Question: Solve the following system of linear equations. Enter your solution like x=-7, y=8. If there are infinitely many solutions, enter redundant. If there is no solution, enter no solution.
15x+10y = 70
18x+12y = 78

 
     

Section 8.1
Quiz 8.5
Question: Solve the following system of linear equations. Enter your solution like x=-7, y=8. If there are infinitely many solutions, enter redundant. If there is no solution, enter no solution.
15x+10y = 70
18x+12y = 84

 
     

Section 8.2
Quiz 8.6
Question: Solve the following system of linear equations. If there are infinitely many solutions, enter redundant. If there is no solution, enter no solution.
6x+y5z = 4
5x+7y+2z = 28
4xy5z = –4

 
     
  Variation: Solve the following system of linear equations. If there are infinitely many solutions, enter redundant. If there is no solution, enter no solution.
x4y+5z = 15
x+5y4z = –13
8x+5y+3z = –34

 
     

Section 8.2
Quiz 8.7
Question: Solve the following system of linear equations. If there are infinitely many solutions, enter redundant. If there is no solution, enter no solution.
4x+4y+4z = –8
–7x3y5z = –6
3x+4y6z = 8

 
     

Section 8.2
Quiz 8.8
Question: The manager of a movie theater needs to calculate the number of each type of ticket sold. Children's tickets cost $5.50 each; senior citizen's tickets cost $7.00; and full-price tickets cost $8.00. There were 193 total tickets sold, and 76 of those were discounted tickets. If the total revenue was $1397.50, how many children's tickets were sold?