Preview/Review - System of Equations

Is (-2, -5) a solution to this system?:
y = 7x + 9
2y + 2x = -18

• YES

• NO

• Cannot be determined

What is the solution to this system of equations?

• (1,4)
• (4,1)
• (3,5)
• (-1, 4)

How may solutions does this graph have?

• None
• 1
• 3
• Infinitely many

How many solutions does this system have?

• None

• 1

• 3

• Infinitely many

Solve the following system by graphing.  What is the solution?

• Infinite number of solutions
• (3, 3)
• (3, -3)
• (-3, 3)

Solve for x and y:
y = 2x + 1
y = 4x - 1

• (1,3)
• (-1,-3)
• (-1,3)
• (3,1)

Solve the system of equations.
y = 4x+1
3x + 2y = 13

• (1, 5)
• (5, 1)
• (0.25, 2)
• ∅

Solve by elimination:
9x-4y=7
x-4y=-17

• (-1,5)
• (-7,5)
• (7,5)
• (3,5)

Solve:
x + y = 4
-5x - 6y = -18

• (6, -2)
• (-6, 10)
• (2, 2)
• (-2, 6)

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