System of Equations Precalculus

Christian had brochures printed for a new business venture. Christian originally ordered 4 boxes of black-and-white brochures and 3 boxes of color brochures, which cost a total of $134. After those ran out, Christian spent $120 on 3 boxes of black-and-white brochures and 3 boxes of color brochures. Which system represents this situation?

• x+y=134
  x+y=120

• 3x+3y=134
  4x+3y=120

• 4x+3y=134
  3x+3y=120

• 7xy=134
  6xy=120

 4x + 8y =  20
-4x + 2y = -30

• (-7,1)

• (2,-5)

• (-2,5)

• (7,-1)

Solve using elimination.
−4x − 4y = 0
8x + 8y = 0

• (−6, −4) 

• Infinite number of solutions  

• No solutions

• (6, 4) 

• Infinite Solutions

Solve the system of linear equations 
5x - 3y = -36
2x + 3y = 15

• (-3, 7)

• (-3, -5)

• (7, -3)

• (-3, 0)

Find the solution of the system of linear equations
3x - 2y = 12
2x + y = 1

• (-2, -3)

• (2, 0)

• (2, -3)

• (-3, 2)

What is the solution to the system?

• (0, 3)

• (1, -1)

• (-3, 1)

• (1, 3)

Does the system have one, none or infinite solutions?
8x + 4y = 12
y = -2x + 3

• (0,3)

• (3,0)

• No solution(parallel lines)

• Infinitely many solutions

When you graph the exact same equation twice,

• you will have no solution. 

• you will have one solution.

• you will have infinite solutions. 

• you will graph a giraffe.